| L.A. Clippers Dance Squad | E! | 2016 | 1 | 8 | Reality |
| L.A. Doctors | CBS | 1998–1999 | 1 | 24 | Drama |
| L.A. Firefighters | Fox | 1996 | 2 | 13 | — |
| L.A. Heat | TNT | 1997–1999 | 2 | 48 | Drama |
| L.A. Law | NBC | 1986–1994 | 8 | 171 | Drama |
| L.A.'s Finest | Spectrum | 2019–2020 | 2 | 13 | Police procedural |
| The L Word | Showtime | 2004–2009 | 6 | 70 | LGBTQ |
| The L Word:Generation Q | Showtime | 2019–2023 | 3 | 28 | LGBTQ |
| La Banda | Univision | 2015 | 2 | 22 | — |
| La Brea | NBC | 2021–2024 | 3 | 30 | — |
| La casa de al lado | Telemundo | 2011–2012 | — | 165 | Telenovela |
| La Corte del Pueblo | KSCN-TV | 1999–2004 | 5 | 44 | — |
| La Fan | Telemundo | 2017 | 1 | 54 | Romantic comedy |
| La FortunaMiniseries | Movistar Plus+ | 2021 | 1 | 6 | Adventure |
| La Guzmán | Imagen Televisión | 2019 | 1 | 59 | — |
| LA Ink | TLC | 2007–2011 | 7 | 84 | Docu-soap |
| La La Land | Showtime | 2010 | 1 | 6 | Comedy |
| La La's Full Court Life | VH1 | 2011–2014 | 5 | 45 | Reality |
| La La's Full Court Wedding | VH1 | 2010 | 1 | 6 | Documentary |
| La ley del silencio | Telemundo | 2005 | — | 32 | Telenovela |
| La Madame | UniMás, Caracol Televisión | 2013 | — | 50 | Telenarconovela |
| La MáquinaMiniseries | Hulu | 2024 | — | 6 | Drama |
| La mujer de mi vida | Telemundo | 2024 | — | 105 | Telenovela |
| La Reina del Sur | Telemundo | 2011 | — | 123 | Telenovela |
| La reina soy yo | Univision, MBC 4 | 2019 | — | 82 | Telenovela |
| La Revancha | Venevisión | 2000 | — | 151 | Telenovela |
| LA to Vegas | Fox | 2018 | 1 | 15 | Comedy |
| La Voz | Telemundo | 2019–on air | 1 | — | Talent show |
| Lab Rats | Disney XD | 2012–2016 | 4 | 89 | Science fiction |
| Lab Rats: Elite Force | Disney XD | 2016 | 1 | 15 | Science fiction comedy |
| LaceMiniseries | ABC | 1984 | — | 2 | Drama |
| Lachey's: Raising the Bar | A&E | 2015 | 1 | 10 | Reality |
| Ladies First: A Story of Ladies in Hip-Hop | Netflix | 2023–on air | 1 | 4 | Documentary |
| Ladies Man | CBS | 1980–1981 | 1 | 16 | Sitcom |
| Ladies Man | CBS | 1999–2001 | 2 | 30 | Sitcom |
| Ladies Night | BET | 2019 | — | 9 | — |
| Ladies of London: The New Reign | Bravo | 2014–2017 | 2 | 18 | Reality |
| The Lady and the DaleMiniseries | HBO | 2021 | — | — | Documentary |
| Lady Blue | ABC Signature | 1985–1986 | 1 | 14 | Crime |
| Lady Chatterly's Stories | Showtime | 2000–2001 | — | 17 | Anthology |
| Lady Dynamite | Netflix | 2016–2017 | 2 | 20 | Sitcom |
| Lady in the LakeMiniseries | Apple TV | 2024 | — | 7 | Drama |
| Laff-A-LympicsAnimated series | ABC | 1977–1978 | 2 | 24 | Crossover |
| Laff Mobb's Laff Tracks | TruTV | 2018–on air | 2 | 38 | Comedy |
| Laguna Beach: The Real Orange County | MTV | 2004–2006 | 3 | 43 | Docu-soap |
| The Lair | HereTV | 2007–2009 | 3 | 28 | Horror |
| LalaloopsyAnimated series | Nick Jr. Channel, Nickelodeon | 2013–2015 | 2 | 52 | — |
| Lamb Chop's Play-Along | PBS | 1992–1995 | 4 | 84 | — |
| Lancelot Link, Secret Chimp | ABC | 1970–1971 | 2 | 17 | Comedy |
| Lancer | CBS | 1968–1970 | 2 | 51 | Western |
| The Land Before TimeAnimated series | Cartoon Network | 2007–2008 | 1 | 26 | Comedy |
| The Land of Gorch | | 1975–1976 | 1 | 16 | Comedy |
| Land of the Giants | ABC | 1968–1970 | 2 | 51 | Science fiction |
| Land of the Lost | NBC, ABC | 1974–1976 | 3 | 43 | Science fiction |
| Land of the Lost | ABC | 1991–1992 | 2 | 26 | Science fiction |
| Land of Women | Apple TV | 2024–on air | 1 | 6 | — |
| Land's End | Syndication | 1995–1996 | 1 | 22 | Detective |
| Landman | Paramount+ | 2024–on air | 2 | 17 | Neo-western |
| Landmark Cases: 12 Historic Supreme Court Decisions | C-SPAN | 2015–2018 | 2 | 24 | — |
| LandscapersMiniseries | HBO, Sky Atlantic | 2021 | 1 | 4 | Drama |
| The LangoliersMiniseries | ABC | 1995 | — | 2 | Science fiction |
| Lanigan's Rabbi | NBC | 1977 | 1 | 4 | Drama |
| Lanterns | HBO | 2026–on air | 1 | 8 | Action |
| Laramie | NBC | 1959–1963 | 4 | 124 | Western |
| Laredo | NBC | 1965–1967 | 2 | 56 | Comedy |
| Largo Winch | M6 | 2001–2003 | 2 | 39 | Action |
| Larry Charles' Dangerous World of Comedy | Netflix | 2019 | 1 | 4 | Comedy |
| Larry King Live | CNN | 1985–2010 | — | 6,120 | News |
| The Larry Sanders Show | HBO | 1992–1998 | 6 | 89 | Comedy |
| Larrymania | Universo | 2012–2020 | 5 | 70 | — |
| Las Vegas | NBC | 2003–2008 | 5 | 106 | Comedy-drama |
| Las Vegas Jailhouse | | 2010–2012 | 5 | 46 | Reality |
| Lassie | CBS | 1954–1973 | 19 | 588 | Family |
| Lassie | TF1 | 2013 | 1 | 26 | — |
| Lassie's Rescue RangersAnimated series | ABC | 1972–1973 | 1 | 16 | — |
| The Last Alaskans | Discovery Channel, Animal Planet | 2015–2019 | 2 | 16 | — |
| Last Call | CNBC | 2023–on air | — | — | Opinion journalism |
| Last Call with Carson Daly | NBC | 2002–2019 | 17 | 2,000 | — |
| Last Chance U | Netflix | 2016–2020 | 1 | 6 | Sport |
| Last Comic Standing | NBC | 2003–2015 | 9 | 76 | Reality |
| The Last Czars | Netflix | 2019 | 1 | 6 | Docudrama |
| The Last Dance | ESPN | 2020 | 1 | 10 | Documentary |
| The Last Days of PompeiiMiniseries | ABC | 1984 | — | 3 | Adventure |
| The Last Defense | ABC | 2018 | — | — | Documentary |
| The Last DonMiniseries | CBS | 1997 | 1 | 3 | Drama |
| The Last Don IIMiniseries | CBS | 1998 | 1 | 2 | — |
| The Last FrontierMiniseries | CBS | 1986 | — | 2 | — |
| The Last Frontier | Fox | 1996 | 1 | 6 | Sitcom |
| The Last Frontier | Apple TV | 2025–on air | — | — | — |
| The Last Kids on EarthAnimated series | Netflix | 2019–2021 | 3 | 21 | Post-apocalyptic |
| The Last Man on Earth | Fox | 2015–2018 | 4 | 56 | Post-apocalyptic |
| Last Man Standing | Fox | 2011–2021 | 9 | 194 | Sitcom |
| The Last Movie Stars | Cinemax | 2022–on air | 1 | 6 | Documentary |
| The Last O.G. | TBS | 2018–2021 | 4 | 40 | Sitcom |
| The Last of Us | HBO | 2023–on air | 2 | 16 | Thriller |
| The Last Precinct | NBC | 1986 | 1 | 8 | Sitcom |
| The Last Resort | CBS | 1979–1980 | 1 | 15 | Sitcom |
| Last Resort | ABC | 2012–2013 | 1 | 13 | Drama |
| The Last Ship | TNT | 2014–2018 | 5 | 46 | Action |
| The Last Thing He Told MeMiniseries | Apple TV | 2023–2026 | 2 | 15 | Thriller |
| The Last Tycoon | Prime Video | 2017 | 1 | 9 | — |
| Last Week Tonight with John Oliver | HBO | 2014 | 12 | 341 | Late-night talk show |
| The Late Late Show | CBS | 1995–2023 | — | 5,346 | — |
| The Late Late Show with Craig Ferguson | CBS | 2005–2014 | 9 | 2,058 | Late-night talk show |
| The Late Late Show with James Corden | CBS | 2015–2023 | 2 | 276 | Late-night talk show |
| Late Night | NBC | 1982 | — | — | Late-night talk show |
| Late Night Joy | TLC | 2015 | 1 | 5 | — |
| Late Night with Conan O'Brien | NBC | 1993–2009 | 16 | 2,725 | Talk show |
| Late Night with David Letterman | NBC | 1982–1993 | 11 | 1,819 | Late-night talk show |
| Late Night with Jimmy Fallon | NBC | 2009–2014 | 5 | 969 | Late-night talk show |
| Late Night with Seth Meyers | NBC | 2014 | 12 | 1,635 | Late-night talk show |
| Late Show | CBS | 1993–2026 | — | — | Late-night talk show |
| Late Show with David Letterman | CBS | 1993–2015 | 23 | 4,214 | Late-night talk show |
| The Late Show with Stephen Colbert | CBS | 2015–2026 | 11 | 1,801 | Late-night talk show |
| Late World with Zach | VH1 | 2002 | 1 | 36 | — |
| LateLine | NBC | 1998–1999 | 2 | 24 | Sitcom |
| Laura | Telemundo, Las Estrellas | 1998–2015 | 18 | 4,680 | Talk show |
| Laura Coates Live | CNN | 2023–on air | — | — | News broadcasting |
| Laurel and HardyAnimated series | Syndication | 1966–1967 | 1 | 156 | Comedy |
| Laurel AvenueMiniseries | HBO | 1993 | — | — | — |
| Laurie Hill | ABC | 1992 | 1 | 9 | — |
| Laverne & Shirley | ABC | 1976–1983 | 8 | 178 | Sitcom |
| Laverne & ShirleyAnimated series | ABC | 1981–1982 | 1 | 13 | Comedy |
| The Law & Harry McGraw | CBS | 1987–1988 | 1 | 16 | — |
| The Law and Mr. Jones | ABC | 1960–1961 | 2 | 45 | Police procedural |
| Law & Order | NBC | 1990 | 26 | 523 | Police procedural |
| Law & Order: Criminal Intent | USA Network, NBC | 2001–2011 | 10 | 197 | Drama |
| Law & Order: LA | NBC | 2010–2011 | 1 | 22 | Crime |
| Law & Order: Organized Crime | Peacock, NBC | 2021–on air | 5 | 75 | Thriller |
| Law & Order: Special Victims Unit | NBC | 1999 | 28 | 594 | Mystery |
| Law & Order: Trial by Jury | TruTV, NBC | 2005–2006 | 1 | 13 | Drama |
| Law & Order True Crime | NBC | 2017 | — | 8 | Drama |
| The Law Firm | NBC | 2005 | 1 | 8 | Reality |
| Law of the Plainsman | NBC | 1959–1960 | 1 | 30 | Western |
| Lawbreakers | Syndication | 1963–1964 | 1 | 32 | — |
| Lawless | Fox | 1997 | 1 | 1 | Detective |
| The Lawless Years | NBC | 1959–1961 | 3 | 47 | Detective |
| Lawman | ABC | 1958–1962 | 4 | 156 | Drama |
| Lawmen: Bass Reeves | Paramount+ | 2023–on air | 1 | 8 | Western |
| The Lawrence Welk Show | KTLA | 1955–1982 | — | 1,065 | — |
| LAX | NBC | 2004–2005 | 1 | 13 | Drama |
| The Layover | Travel Channel | 2011–2013 | 2 | 20 | — |
| The Laytons | DuMont | 1948 | 1 | 10 | Sitcom |
| Lazarus | Prime Video | 2025–on air | — | — | Thriller |
| The Lazarus Man | TNT | 1996 | 1 | 22 | Western |
| The Lazarus Syndrome | ABC | 1979 | 1 | 12 | — |
| Lazer Tag Academy | NBC | 1986 | 1 | 13 | Science fiction |
| Lazor WulfAnimated series | Adult Swim, Cartoon Network | 2019–2021 | — | — | Comedy |
| Le piège du désir | Showtime | 1994 | 4 | 23 | — |
| The League | FX | 2009–2015 | 7 | 84 | Sitcom |
| A League of Their Own | CBS | 1993 | 1 | 6 | Sitcom |
| A League of Their Own | Prime Video | 2022–on air | 1 | 8 | Comedy-drama |
| Leah Remini: It's All Relative | TLC | 2014–2015 | 2 | 26 | Reality |
| Leah Remini: Scientology and the Aftermath | A&E | 2016–2019 | 1 | 7 | — |
| Leanne (TV series) | Netflix | 2025–on air | 2 | 26 | Sitcom |
| Leap of Faith | NBC | 2002 | 1 | 6 | Sitcom |
| Leap Year | USA Network | 2011–2012 | 2 | 20 | Comedy |
| Leap Years | Showtime | 2001–2002 | 1 | 20 | Drama |
| Learn to Read | PBS | 1987 | 1 | 30 | — |
| The Learning Channel's Great Books | TLC | 1993 | — | — | Documentary |
| Leave It to Beaver | CBS | 1957–1963 | 6 | 234 | Sitcom |
| Leave It to Lamas | E! | 2009 | 1 | 8 | Reality |
| Leave It To Stevie | VH1 | 2016 | 1 | 8 | Reality |
| LeavenworthMiniseries | Starz | 2019 | — | 6 | Drama |
| Leaving L.A. | ABC | 1997 | 1 | 6 | Drama |
| Leepu & Pitbull | History | 2015 | 1 | — | Reality |
| The Leftovers | HBO | 2014–2017 | 3 | 28 | Fantasy |
| Leg Work | CBS | 1987 | 1 | 10 | Drama |
| Legacies | The CW | 2018–2022 | 4 | 68 | Werewolf |
| Legacy | UPN | 1998–1999 | 1 | 18 | Drama |
| Legacy: The True Story of the LA Lakers | Disney+ | 2022–on air | — | 10 | Documentary |
| Legend | UPN | 1995 | 1 | 12 | Science fiction |
| The Legend of Calamity JaneAnimated series | The WB | 1997–1998 | 1 | 13 | Comedy |
| The Legend of Jesse James | ABC | 1965–1966 | 1 | 34 | Western |
| The Legend of KorraAnimated series | Nickelodeon | 2012–2014 | 4 | 52 | Fantasy |
| The Legend of Prince ValiantAnimated series | Freeform | 1991–1993 | 2 | 65 | Soundtrack |
| The Legend of Shelby the Swamp Man | History | 2013–2015 | 2 | 10 | Reality |
| The Legend of TarzanAnimated series | Syndication, UPN | 2001–2003 | 1 | 39 | Children's |
| Legend of the Seeker | Syndication | 2008–2010 | 2 | 44 | Fantasy |
| The Legend of Vox MachinaAnimated series | Prime Video | 2022–on air | 4 | 48 | Fantasy |
| The Legend of ZeldaAnimated series | Syndication | 1989 | 1 | 13 | Children's |
| Legendary | HBO Max | 2020–on air | 3 | 29 | Reality |
| Legends | TNT | 2014–2015 | 2 | 20 | Drama |
| Legends of Bikini BottomAnimated series | Nickelodeon | 2011 | 1 | 6 | Anthology |
| Legends of Chamberlain Heights | Comedy Central | 2016–2017 | 1 | 20 | — |
| Legends of the Hidden Temple | Nickelodeon, The CW | 1993–2022 | 4 | 133 | Game show |
| Legends of the Lost with Megan FoxMiniseries | Travel Channel | 2018 | 1 | 4 | Documentary |
| Legends of the SuperheroesMiniseries | NBC | 1979 | 1 | 2 | Action |
| Legends of Tomorrow | The CW | 2016–2022 | 7 | 110 | Fantasy |
| Legion | FX | 2017–2019 | 3 | 27 | Fantasy |
| The Legion of Extraordinary DancersWeb series | | 2010–2011 | 3 | 30 | Adventure |
| Legion of Super HeroesAnimated series | The CW, Kids' WB | 2006–2008 | 2 | 26 | Science fiction |
| Legit | FX | 2013–2014 | 2 | 26 | Comedy |
| Legmen | NBC | 1984 | 1 | 8 | — |
| Lego City AdventuresAnimated series | Nickelodeon | 2019–on air | 3 | 26 | Drama |
| Lego Masters | Fox | 2020–on air | 4 | 46 | — |
| Lego Nexo KnightsAnimated series | Cartoon Network | 2015–2018 | 4 | 40 | Knight |
| Lego Star Wars: Droid TalesAnimated series | Disney XD | 2015 | 1 | 5 | Comedy |
| Lego Star Wars: The Freemaker AdventuresAnimated series | Disney XD | 2016–2017 | 2 | 26 | Comedy |
| Lenny | CBS | 1990–1991 | 1 | 17 | Sitcom |
| Leo Little's Big Show | Disney Channel | 2009–2010 | 1 | 10 | — |
| Leonardo | Rai 1 | 2021–on air | 1 | 8 | Period drama |
| The Leslie Uggams Show | CBS | 1969 | 1 | 10 | Comedy |
| Less Than Perfect | ABC | 2002–2006 | 4 | 81 | Sitcom |
| Lessons in Chemistry | Apple TV | 2023–on air | 1 | 8 | Historical drama |
| Let's Ask America | Syndication | 2012–2015 | 3 | — | — |
| Let's Be Real | Fox | 2021 | — | — | — |
| Let's Bowl | Comedy Central | 2001–2002 | 1 | 20 | — |
| Let's Go Back | YTA | 1991–1993 | — | — | Game show |
| Let's Go Luna!Animated series | PBS Kids, TVOKids | 2018–2020 | 2 | 64 | Comedy |
| Let's Make a Deal | CBS, NBC | 2009 | 6 | 1,395 | Game show |
| Let's Stay Together | BET | 2011–2014 | 4 | 55 | Sitcom |
| Let's Talk About Pep | VH1 | 2010 | 1 | 8 | Reality |
| Let the Right One In | Showtime | 2022 | 1 | 10 | Horror |
| Lethal Weapon | Fox | 2016–2019 | 3 | 40 | Comedy-drama |
| Letter to Loretta | NBC | 1953–1961 | 8 | 257 | Anthology |
| Letters to Laugh-In | NBC | 1969 | — | — | Comedy |
| Level 9 | Syfy, UPN | 2000–2001 | 1 | 13 | Science fiction |
| Level Up | The CW, Cartoon Network | 2012–2013 | 2 | 35 | — |
| Leverage | TNT | 2008–2012 | 5 | 77 | Drama |
| Lewis & Clark | NBC | 1981–1982 | 1 | 13 | Sitcom |
| Lewis Black's Root of All Evil | Comedy Central | 2008 | 2 | 18 | Comedy |
| LG15: Outbreak | | 2010 | 1 | 42 | — |
| The LiberatorMiniseries | Netflix | 2020 | 1 | 4 | War |
| Liberty's KidsAnimated series | PBS | 2002–2003 | 1 | 40 | Historical |
| The Librarians | TNT | 2014–2018 | 4 | 42 | Science fiction |
| The Librarians: The Next Chapter | TNT | 2025 | — | — | — |
| Lidsville | ABC | 1971–1973 | — | 17 | Comedy |
| Lie Detectors | Game Show Network | 2015 | 1 | 18 | — |
| Lie to Me | Fox | 2009–2011 | 3 | 48 | Drama |
| The Lieutenant | NBC | 1963–1964 | 1 | 29 | — |
| Life | NBC | 2007–2009 | 2 | 32 | Drama |
| Life After People | History | 2008–2010 | 2 | 20 | Post-apocalyptic fiction |
| Life After Top Chef | Bravo | 2012 | 1 | 8 | Reality |
| Life & Beth | Hulu | 2022–on air | 2 | 20 | Comedy-drama |
| The Life and Legend of Wyatt Earp | ABC | 1955–1961 | 6 | 229 | Western |
| Life... and Stuff | CBS | 1997 | 1 | 5 | Sitcom |
| The Life and Times of Grizzly Adams | NBC | 1977–1978 | 2 | 38 | Drama |
| The Life & Times of Juniper LeeAnimated series | Cartoon Network | 2005–2007 | 3 | 40 | Action |
| The Life & Times of TimAnimated series | HBO | 2008–2012 | 3 | 30 | Adult animation |
| Life as We Know It | ABC | 2004–2005 | 1 | 13 | Drama |
| Life Begins at Eighty | NBC | 1950–1956 | — | — | Panel game |
| Life Below Zero | National Geographic | 2013 | 7 | 84 | Documentary |
| Life: First StepsMiniseries | Discovery Channel | 2018 | 1 | 3 | Documentary |
| Life Goes On | ABC | 1989–1993 | 4 | 83 | Drama |
| Life in Pieces | CBS | 2015–2019 | 4 | 79 | Sitcom |
| Life Is Wild | The CW | 2007–2008 | 1 | 13 | Drama |
| Life, Larry and the Pursuit of Unhappiness | HBO, HBO Max | 2026–on air | — | 7 | Sketch comedy |
| Life, Liberty & Levin | Fox News | 2018–on air | 6 | 358 | Talk show |
| Life of Kylie | E! | 2017 | 1 | 8 | Reality |
| Life of Ryan | MTV | 2007–2009 | 3 | 30 | Docu-soap |
| Life on a Stick | Fox | 2005 | 1 | 13 | Sitcom |
| Life on Mars | ABC | 2008–2009 | 1 | 17 | Police procedural |
| Life on Our Planet | Netflix | 2023 | 1 | 8 | — |
| Life on Top | Cinemax | 2009–2011 | 2 | 26 | Drama |
| Life's Too Short | HBO, BBC Two | 2011–2013 | 1 | 8 | Sitcom |
| Life's Work | ABC | 1996–1997 | 1 | 18 | Sitcom |
| Life Sentence | The CW | 2018 | 1 | 13 | Comedy-drama |
| Life Unexpected | The CW | 2010–2011 | 2 | 26 | Drama |
| Life with Bonnie | ABC | 2002–2004 | 2 | 44 | Comedy |
| Life with Elizabeth | Syndication | 1953–1955 | 2 | 65 | Sitcom |
| Life With La Toya | OWN | 2013–2014 | 2 | 22 | Reality |
| Life with LouieAnimated series | Fox | 1994–1998 | 3 | 39 | Comedy |
| Life with Lucy | ABC | 1986 | 1 | 13 | Sitcom |
| Life with Roger | The WB | 1996–1997 | 1 | 20 | Sitcom |
| Lifechangers | The CW | 2011–2012 | 1 | — | Talk show |
| Lifeline | YouTube Premium | 2017 | 1 | 8 | Science fiction |
| Lifestories | NBC | 1990–1991 | 1 | 11 | Medical drama |
| Lifestories: Families in Crisis | HBO | 1992–1996 | 2 | 15 | Drama |
| Lifestyles of the Rich and Famous | Syndication | 1984–1995 | — | — | Reality |
| Light & Magic | Disney+ | 2022 | 1 | 6 | Documentary |
| Light as a Feather | Hulu | 2018–2019 | 2 | 26 | Thriller |
| Lightning Force | Syndication | 1991–1992 | 1 | 22 | — |
| Lights Out | NBC | 1946–1952 | 4 | 160 | Thriller |
| Lights Out | FX | 2011 | 1 | 13 | Drama |
| Lights Out with David Spade | Comedy Central | 2019–2020 | — | — | — |
| Like Family | The WB | 2003–2004 | 1 | 22 | Sitcom |
| Like Water for Chocolate | HBO | 2024–on air | — | — | Drama |
| Likely Suspects | Fox | 1992–1993 | 1 | 13 | — |
| Lil' BushAnimated series | Comedy Central | 2007–2008 | 2 | 17 | Adult animation |
| Lil' Kim: Countdown to Lockdown | BET | 2006 | 1 | 6 | Reality |
| Lilias, Yoga and You | PBS | 1970–1999 | — | 500 | — |
| Lilly the WitchAnimated series | CBBC | 2004–2013 | 3 | 52 | Animation |
| Lilo & Stitch: The SeriesAnimated series | Disney Channel | 2003–2006 | 2 | 65 | Children's |
| Lily | CBS | 1973 | 3 | 3 | Humor |
| Lilyhammer | Netflix, NRK1 | 2012–2014 | 3 | 24 | Comedy-drama |
| Lime Street | ABC | 1985 | 1 | 8 | Drama |
| LimetownWeb series | Facebook Watch | 2019 | — | — | Drama |
| Limitless | CBS | 2015–2016 | 1 | 22 | Action |
| Linc's | Showtime | 1998–2000 | 2 | 35 | Sitcom |
| Lincoln Heights | Freeform | 2007–2009 | 4 | 43 | Drama |
| The Lincoln Lawyer | Netflix | 2022–on air | 4 | 40 | Mystery |
| Lincoln Rhyme: Hunt for the Bone Collector | NBC | 2020 | 1 | 10 | Drama |
| Lindsay | OWN | 2014 | 1 | 8 | Reality |
| Lindsay Lohan's Beach Club | MTV | 2019 | 1 | 12 | Reality |
| Line of Fire | ABC | 2003–2004 | 1 | 13 | Crime |
| The Lineup | CBS | 1954–1960 | 6 | 200 | Police procedural |
| Lingerie | Cinemax | 2009–2010 | 2 | 26 | Drama |
| Lingo | CBS, Game Show Network | 1987–2024 | — | — | Game show |
| The Link | National Geographic | 2012 | — | 8 | Documentary |
| Linus the LionheartedAnimated series | CBS | 1964–1969 | 2 | 39 | Comedy |
| The Lion GuardAnimated series | Disney Jr. | 2015–2019 | 3 | 74 | Comedy |
| The LionheartsAnimated series | Syndication | 1998 | 1 | 13 | Comedy |
| The Lions of Sicily | Disney+ | 2023–on air | 1 | 8 | Historical drama |
| Lip Sync Battle | Paramount Network | 2015–2019 | 5 | 91 | — |
| Lip Sync Battle Shorties | Nickelodeon | 2016–2019 | 2 | 20 | Reality competition |
| Lippy the Lion & Hardy Har HarAnimated series | Syndication | 1962–1963 | 1 | 52 | — |
| Lipstick Jungle | NBC | 2008–2009 | 2 | 20 | Comedy-drama |
| Liquid Science | Red Bull TV | 2017 | 1 | 11 | Documentary |
| Liquid TelevisionAnimated series | MTV | 1991–1994 | 3 | 27 | — |
| Lisey's StoryMiniseries | Apple TV | 2021 | — | 8 | — |
| Listen Up | CBS | 2004–2005 | 1 | 22 | Sitcom |
| Little America | Apple TV | 2020–on air | 2 | 16 | — |
| Little Big Shots | NBC, Citytv | 2016 | 4 | 47 | Talent show |
| Little BillAnimated series | BET, Nickelodeon | 1999–2003 | 5 | 127 | Educational |
| Little Britain USA | HBO | 2008 | 1 | 6 | — |
| Little Britches on the Road | RFD-TV | 2013 | 6 | 17 | Documentary |
| Little CharmersAnimated series | Nick Jr. Channel | 2015–2017 | 1 | 40 | — |
| The Little Clowns of HappytownAnimated series | ABC | 1987–1988 | 1 | 18 | Comedy |
| The Little Couple | TLC | 2009–2019 | 12 | 182 | Reality |
| A Little CuriousAnimated series | HBO | 1998–2000 | 2 | 43 | Children's |
| Little DemonAnimated series | FX | 2022 | 1 | 10 | — |
| The Little Drummer Girl | BBC One | 2018 | 1 | 6 | Drama |
| Little EinsteinsAnimated series | Playhouse Disney, Disney Channel | 2005–2009 | 2 | 67 | Children's |
| Little Fires EverywhereMiniseries | Hulu | 2020 | 1 | 8 | Drama |
| Little Gloria... Happy at LastMiniseries | NBC | 1982 | — | 2 | — |
| A Little Help with Carol Burnett | Netflix | 2018–on air | 1 | 12 | — |
| Little House on the Prairie | NBC | 1974–1983 | 9 | 204 | Drama |
| Little House on the PrairieMiniseries | ABC | 2005 | — | 6 | Drama |
| A Little Late with Lilly Singh | NBC | 2019–2021 | — | — | — |
| The Little Lulu ShowAnimated series | Cartoon Network, Boomerang | 1995–1999 | 3 | 52 | Comedy |
| Little Men | CTV Television Network | 1998–1999 | 2 | 26 | — |
| The Little MermaidAnimated series | CBS | 1992–1995 | 3 | 31 | Children's |
| Little Mouse on the PrairieAnimated series | Freeform | 1997–1998 | 1 | 26 | Comedy |
| Little People | Universal Kids/MeTV Toons | 2016 | 1 | 52 | — |
| Little People, Big World | TLC | 2006 | 22 | 363 | Reality |
| Little People Big World: Wedding Farm | TLC | 2012 | 1 | 6 | Reality |
| The Little RascalsAnimated series | ABC | 1982–1984 | — | 22 | Comedy |
| Little RichardMiniseries | NBC | 2000 | — | — | Biographical |
| Little RoseyAnimated series | ABC | 1990 | 1 | 13 | Children's |
| Little ShopAnimated series | Fox | 1991 | 1 | 13 | — |
| The Little WizardsAnimated series | ABC | 1987–1988 | 1 | 13 | Children's |
| Little WomenMiniseries | NBC | 1978 | 1 | 2 | Romance |
| Little Women: Atlanta | Lifetime | 2016–2019 | 3 | 25 | — |
| Little Women: Dallas | Lifetime | 2016–2017 | 1 | 7 | — |
| Little Women: LA | Lifetime | 2014–2019 | 4 | 46 | Reality |
| Little Women: NY | Lifetime | 2015–2016 | 2 | 10 | Reality |
| The LittlesAnimated series | ABC | 1983–1985 | 3 | 29 | Comedy |
| The Littlest Groom | Fox | 2004 | 1 | 2 | Reality |
| Littlest Pet ShopAnimated series | Syndication | 1995 | 1 | 40 | — |
| Littlest Pet ShopAnimated series | TF1 | 2012–2016 | 4 | 104 | Children's |
| Littlest Pet Shop: A World of Our OwnAnimated series | Discovery Family | 2018 | 1 | 52 | Adventure |
| Liv and Maddie | Disney Channel | 2013–2017 | 4 | 80 | Children's |
| Live at Five | WNBC | 1979–2007 | — | — | — |
| Live at Gotham | Comedy Central | 2006–2009 | — | — | Comedy |
| The Live Desk | Fox News | 2006–2010 | — | — | Talk show |
| Live from Lincoln Center | PBS | 1976 | 43 | 251 | — |
| Live-In | CBS | 1989 | 1 | 9 | Sitcom |
| Live PD | A&E | 2016–2020 | 3 | 18 | Reality |
| Live Shot | UPN | 1995–1996 | 1 | 13 | Drama |
| Live Through This | MTV | 2000–2001 | 1 | 13 | — |
| Live to Dance | CBS | 2011 | 1 | 7 | Reality |
| Live to Lead | Netflix | 2022–on air | — | — | Documentary |
| Live with Kelly and Mark | Syndication, WABC-TV | 1983–1988 | — | 7,580 | Talk show |
| Lives on Fire | OWN | 2012 | 1 | 6 | Reality |
| Livin' for the Apocalypse | TLC | 2011 | 1 | 1 | — |
| Livin' Lozada | OWN | 2015–2016 | 2 | 8 | Reality |
| Living Biblically | CBS | 2018 | 1 | 13 | Comedy |
| The Living Century | PBS | 2000–2003 | — | 5 | Biographical |
| Living Dolls | ABC | 1989 | 1 | 12 | Sitcom |
| Living in Captivity | Fox | 1998 | 1 | 8 | Sitcom |
| Living Lahaina | MTV | 2007 | 1 | 8 | Reality |
| Living Lohan | E! | 2008 | 1 | 9 | Reality |
| Living Single | Fox | 1993–1998 | 5 | 118 | Sitcom |
| Living Undocumented | Netflix | 2019 | 1 | 6 | Documentary |
| Living with Ed | HGTV | 2007–2010 | — | — | — |
| Living With Fran | The WB | 2005–2006 | 2 | 26 | Sitcom |
| Living with Yourself | Netflix | 2019–on air | 1 | 8 | Comedy |
| Liz: The Elizabeth Taylor StoryMiniseries | NBC | 1995 | — | 2 | Biographical |
| Liza on Demand | YouTube Premium | 2018–2021 | 3 | 25 | — |
| The Lizzie Borden Chronicles | Lifetime | 2014–2015 | 1 | 8 | LGBTQ |
| Lizzie McGuire | Disney Channel | 2001–2004 | 2 | 64 | Teen sitcom |
| Llama Llama | Netflix | 2018–2019 | 1 | 15 | — |
| The Lloyd Bridges Show | CBS | 1962–1963 | 1 | 34 | Anthology |
| Lloyd in SpaceAnimated series | ABC | 2001–2004 | 4 | 39 | Children's |
| LoboWeb series | | 2000 | 1 | 15 | Science fiction comedy |
| Lobstermen: Jeopardy at Sea | Discovery Channel | 2006 | 1 | 6 | — |
| Local 58Web series | YouTube | 2015 | 2 | 9 | Analog horror |
| Local on the 8s | The Weather Channel | 1982 | — | — | — |
| Lock 'N Load | Showtime | 2009 | 1 | 6 | Reality |
| Lock N' Load with R. Lee Ermey | History | 2009 | 1 | 13 | Reality |
| Lock-Up | Syndication | 1959–1961 | 2 | 78 | Drama |
| Locke & Key | Netflix | 2020–2022 | 3 | 28 | Adventure |
| Lockerbie: A Search for Truth | Peacock, Sky Atlantic | 2025–on air | — | 5 | Biographical |
| Lockup | MS NOW | 2005–2017 | 25 | 230 | Documentary |
| Lodge 49 | AMC | 2018–2019 | 2 | 20 | Comedy-drama |
| Logan's Run | CBS | 1977–1978 | 1 | 14 | Science fiction |
| Lois & Clark: The New Adventures of Superman | ABC | 1993–1997 | 4 | 88 | Superhero |
| Loiter Squad | Adult Swim, Cartoon Network | 2012–2014 | 2 | 21 | — |
| Loki | Disney+ | 2021–2023 | 2 | 12 | Fantasy |
| Loli's Luck | Telemundo Africa, USA Network | 2021 | 1 | 103 | Comedy-drama |
| Lomax, the Hound of Music | PBS | 2008 | — | 13 | — |
| The Lone Gunmen | Fox | 2001 | 1 | 13 | Comedy |
| The Lone Ranger | ABC | 1949–1957 | 5 | 221 | Western |
| The Lone RangerAnimated series | CBS | 1966–1969 | 2 | 26 | Western |
| The Lone RangerAnimated series | CBS | 1980–1982 | 2 | 28 | Western |
| Lone Star | Fox | 2010 | 1 | 2 | Drama |
| Lone Star Law | Animal Planet | 2016–2021 | 9 | 89 | Reality |
| Lone Target | Discovery Channel | 2014–2015 | 2 | 12 | Reality |
| The Lone Wolf | Syndication | 1954–1955 | 1 | 39 | — |
| Lonely and HornyWeb series | Vimeo | 2016 | — | 10 | Comedy |
| lonelygirl15Web series | YouTube | 2006–2008 | 3 | 547 | — |
| The Loner | CBS | 1965–1966 | 1 | 26 | Western |
| Lonesome DoveMiniseries | CBS | 1989 | 1 | 4 | Western |
| Lonesome Dove | Syndication | 1994–1996 | 1 | 21 | Western |
| The Long, Hot Summer | ABC | 1965–1966 | 1 | 26 | Drama |
| Long Island Medium | TLC | 2011–2019 | 8 | 117 | Reality |
| Long Live the RoyalsMiniseries | Cartoon Network | 2014–2015 | 1 | 4 | Animated sitcom |
| Long Lost Family | TLC | 2016–2019 | 6 | 53 | Documentary |
| The Long Road HomeMiniseries | National Geographic | 2017 | 1 | 8 | War |
| Long Story ShortAnimated series | Netflix | 2025–on air | 1 | 10 | — |
| Longmire | A&E, Netflix | 2012–2017 | 6 | 63 | Western |
| Longstreet | ABC | 1971–1972 | 1 | 23 | Drama |
| Look: The Series | Showtime | 2010 | 1 | 11 | Drama |
| Looking | HBO | 2014–2016 | 2 | 18 | Comedy-drama |
| Looking for AlaskaMiniseries | Hulu | 2019 | 1 | 8 | Teen drama |
| The Looming TowerMiniseries | Hulu | 2018 | 1 | 10 | Drama |
| Loonatics UnleashedAnimated series | The WB | 2005–2007 | 2 | 26 | Science fantasy |
| Looney Tunes CartoonsAnimated series | HBO Max | 2020–2024 | 6 | 82 | Comedy |
| The Looney Tunes ShowAnimated series | Cartoon Network | 2011–2013 | 2 | 52 | Children's |
| The Loop | Fox | 2006–2007 | 2 | 17 | Sitcom |
| Loopy De Loop | | 1959–1965 | 1 | 44 | — |
| Loosely Exactly Nicole | MTV | 2016–2018 | 1 | 10 | — |
| Loot | Apple TV | 2022–on air | 1 | 10 | — |
| Lopez Tonight | TBS | 2009–2011 | 2 | 286 | — |
| Lopez vs. Lopez | NBC | 2022–2025 | 3 | 45 | — |
| The Lord of the Rings: The Rings of Power | Prime Video | 2022–on air | 2 | 16 | Drama |
| Lords of the Car Hoards | Discovery Channel | 2014–2015 | 2 | 12 | Reality |
| Lore | Prime Video | 2017–2018 | 2 | 12 | Anthology |
| Los Espookys | HBO | 2019–2022 | 1 | 6 | — |
| Los Luchadores | YTV | 2001 | 1 | 14 | — |
| Los Miserables | Telemundo | 2014–2015 | — | 119 | Telenovela |
| Lost | NBC | 2001 | — | 6 | Reality |
| Lost | ABC | 2004–2010 | 6 | 121 | Drama |
| Lost at Home | ABC | 2003 | 1 | 4 | — |
| The Lost Flowers of Alice HartMiniseries | Prime Video | 2023 | — | 7 | Drama |
| Lost in OzAnimated series | Prime Video | 2015–2018 | 2 | 26 | Children's |
| Lost in Space | CBS | 1965–1968 | 3 | 83 | Adventure science fiction |
| Lost in Space | Netflix | 2018–2021 | 3 | 28 | Science fiction |
| Lost in the WestMiniseries | Nickelodeon | 2016 | 1 | 3 | Comedy |
| Lost in Transmission | History | 2015 | 1 | 6 | Reality |
| Lost n' FoundWeb series | YouTube | 2017 | 1 | 6 | Sitcom |
| Lost OllieAnimated series | Netflix | 2022–on air | — | — | Drama |
| Lost on Earth | USA Network | 1997 | 1 | 13 | Science fiction |
| The Lost RoomMiniseries | Syfy | 2006 | 1 | 3 | Paranormal |
| The Lost Saucer | ABC | 1975–1976 | — | 16 | Comedy |
| Lost Tapes | Animal Planet | 2008–2010 | 3 | 34 | Found footage |
| Lost Worlds | History | 2005–2007 | 2 | 32 | Documentary |
| The Lot | AMC | 1999–2001 | 2 | 17 | — |
| Lotsa Luck | NBC | 1973–1974 | 1 | 22 | Sitcom |
| Lottery! | ABC | 1983–1984 | 1 | 17 | Drama |
| The Lottery | Lifetime | 2014 | 1 | 10 | Post-apocalyptic |
| Lou Grant | CBS | 1977–1982 | 5 | 114 | Drama |
| The Loud HouseAnimated series | Nickelodeon | 2016 | 11 | 268 | Children's |
| Loudermilk | Audience Network | 2017 | 2 | 20 | Comedy |
| The Loudest Voice | Showtime | 2019 | — | 7 | Biographical |
| Louie | FX | 2010–2015 | 5 | 61 | Comedy-drama |
| The Louie Show | CBS | 1996 | 1 | 6 | Sitcom |
| Love | Netflix | 2016–2018 | 3 | 34 | Comedy |
| Love, American Style | ABC | 1969–1974 | 5 | 108 | Romantic comedy |
| Love and Death | HBO Max | 2023 | 1 | 7 | Biographical |
| Love & Hip Hop: Atlanta | VH1, MTV | 2012 | 5 | 73 | Drama |
| Love & Hip Hop: Hollywood | VH1 | 2014–2019 | 6 | 78 | Reality |
| Love & Hip Hop: Miami | VH1 | 2018–on air | 3 | 40 | LGBTQ |
| Love & Hip Hop: New York | VH1 | 2011–2020 | 9 | 82 | Reality |
| Love and Marriage | NBC | 1959–1960 | 1 | 26 | Sitcom |
| Love and Marriage | Fox | 1996 | 1 | 9 | Sitcom |
| Love & Money | CBS | 1999–2000 | 1 | 13 | Sitcom |
| Love & War | CBS | 1992–1995 | 3 | 68 | Sitcom |
| Love Bites | NBC | 2011 | 1 | 8 | Comedy |
| The Love Boat | ABC | 1977–1986 | 10 | 249 | Comedy |
| Love Boat: The Next Wave | UPN | 1998–1999 | 2 | 25 | Anthology |
| Love Cruise | Fox | 2001 | 1 | 7 | Reality |
| Love, Death & RobotsAnimated series | Netflix | 2019–on air | 4 | 26 | Science fiction |
| Love for the ArtsWeb series | Twitch | 2020 | 1 | 10 | Reality |
| Love Games: Bad Girls Need Love Too | Oxygen | 2010–2013 | 4 | 33 | Game show |
| Love in the Time of Corona | Freeform | 2020 | — | 4 | Romantic comedy |
| Love in the Wild | NBC | 2011–2012 | 2 | 16 | Reality |
| Love, Inc. | UPN | 2005–2006 | 1 | 22 | Sitcom |
| Love Is | OWN | 2018 | — | 6 | — |
| Love Is a Many Splendored Thing | CBS | 1967–1973 | — | 1,430 | Soap opera |
| Love Is Blind | Netflix | 2020–on air | 8 | 110 | Reality |
| Love Is in the Heir | E! | 2004–2005 | 1 | 10 | Reality |
| Love Island | CBS, Peacock | 2019–on air | 8 | 261 | Reality |
| Love It or List It | HGTV, W Network | 2008 | 10 | 130 | Reality |
| Love, Lies and MurderMiniseries | NBC | 1991 | — | — | Crime |
| Love Life | HBO Max | 2020–2021 | 2 | 20 | Romantic comedy |
| Love, Lust or Run | TLC | 2015–2016 | 2 | 24 | — |
| Love Monkey | VH1, CBS | 2006 | 1 | 8 | Sitcom |
| Love of Life | CBS | 1951–1980 | 29 | 7,316 | Soap opera |
| Love on a Rooftop | ABC | 1966–1967 | 1 | 30 | Sitcom |
| Love on the Spectrum U.S. | Netflix | 2022–on air | 3 | 18 | Reality |
| Love, Sidney | NBC | 1981–1983 | 2 | 44 | Sitcom |
| Love Story | NBC | 1973–1974 | 1 | 12 | Drama |
| Love Story | FX | 2026–on air | 1 | 9 | — |
| Love That Girl! | | 2010–2014 | 4 | 64 | Sitcom |
| Love Thy Neighbor | OWN | 2013–2017 | 5 | 118 | Comedy |
| Love Triangle | Game Show Network | 2011 | 1 | 32 | — |
| Love, Victor | Hulu | 2020–2022 | 3 | 28 | Romantic comedy |
| Love You, Mean It with Whitney Cummings | E! | 2012–2013 | 1 | 11 | Reality |
| Lovecraft Country | HBO | 2020 | 1 | 10 | Paranormal |
| Lovers and Friends | NBC | 1977–1978 | — | — | Soap opera |
| Loves Me, Loves Me Not | CBS | 1977 | 1 | 6 | Sitcom |
| Lovespring International | Lifetime | 2006 | 1 | 13 | — |
| Loving | ABC | 1983–1995 | 13 | 3,169 | Soap opera |
| Low Winter Sun | AMC | 2013 | 1 | 10 | Police procedural |
| Lu & the Bally BunchAnimated series | Cartoon Network, HBO Max | 2023 | 1 | 76 | Children's |
| Luann and Sonja: Welcome to Crappie Lake | Bravo | 2023–on air | 1 | 8 | — |
| Lucan | ABC | 1977–1978 | 1 | 12 | — |
| Lucas Bros. Moving Co.Animated series | Fox | 2013–2015 | 2 | 17 | Adult animation |
| Lucas Tanner | NBC | 1974–1975 | 1 | 22 | Drama |
| Lucha Libre USA | MTV2 | 2010–2012 | 2 | 20 | — |
| Lucha Underground | El Rey Network | 2014–2018 | 4 | 127 | — |
| Lucifer | Netflix | 2016–2021 | 6 | 93 | Fantasy |
| Luck | HBO | 2011–2012 | 1 | 9 | Drama |
| Lucky | FX | 2003 | 1 | 13 | Comedy |
| LuckyMiniseries | Apple TV | 2026 | — | — | — |
| Lucky 7 | ABC | 2013 | 1 | 8 | Drama |
| Lucky ChancesMiniseries | NBC | 1990 | — | — | — |
| Lucky Hank | AMC | 2023–on air | — | — | — |
| Lucky Louie | HBO | 2006 | 1 | 13 | Sitcom |
| Lucky LukeAnimated series | France Régions 3 | 1983–1984 | 1 | 26 | Comedy |
| The Lucy-Desi Comedy Hour | CBS | 1957–1960 | 3 | 13 | Sitcom |
| The Lucy Show | CBS | 1962–1968 | 6 | 156 | Sitcom |
| Lucy, the Daughter of the DevilAnimated series | Adult Swim, Cartoon Network | 2005–2007 | 1 | 11 | Adult animation |
| Luis | Fox | 2003 | 1 | 11 | Sitcom |
| Luis Miguel: The Series | Telemundo, Netflix | 2018–2021 | 3 | 27 | Music |
| Luke Cage | Netflix | 2016–2018 | 2 | 26 | Crime |
| Luna Petunia | Netflix | 2016–2017 | 3 | 22 | — |
| Lush Life | Fox | 1996 | 1 | 7 | Sitcom |
| Lux Video Theatre | CBS | 1950–1957 | 7 | 337 | Anthology |
| The Lying Game | Freeform | 2011–2013 | 2 | 30 | Youth |
| The Lyon's Den | NBC | 2003 | 1 | 13 | — |
| The Lyricist Lounge Show | MTV | 2000–2001 | 2 | — | Sketch comedy |