- LCARS
- LI'wI' class
- LIDAR
- LIngta'
- LLiksze
- LLunih
- LLunih tr'Raedheol
- LLyanaa
- LP 327-186
- LSS Concordium
- LSS Dranuur
- LSS Ho'kuun
- LSS Huukaat
- LSS Jaaleet
- LSS N'Kaam
- LSS Reskava
- LSS Treluun
- LSS Vuut
- LV-132
- La'Len Ocean
- La'an Noonien-Singh
- La'voti
- LaChance
- LaFuente Johnson
- LaFuente Johnson (24th century)
- LaGrange AAA-1
- LaLiberté
- LaShaundra
- LaVelle
- LaVelle (engineer)
- La Barre
- La Dotio
- La Fong
- La Forge
- La Forge (Admiral)
- La Forge (Ensign)
- La Forge family
- La Monica
- La Rocca
- La Sirena
- La Sirena class
- Laanur
- Laarin Andos
- Laas
- Labac
- Labar Tique
- Lablijepts
- Laboratory
- Laboratory Assistants' Institute of Ferenginar
- Labra
- Laburnum
- Lacaam
- Lacera
- Laceran
- Laceran system
- Lacerta
- Lacerta (disambiguation)
- Lacey Helios
- Lachian
- Lackey
- Lackey III
- Lackoi
- Lacon City
- Lacon township
- Lacrosse
- Lacroya
- Lacsamana
- Lactra
- Lactra VII
- Lactra VII zoo
- Lactran
- Ladella
- Lado
- Ladon
- Ladra
- Ladra system
- Ladrion
- Lady
- Lady Gaga
- Lady Katam
- Lady of Calydon
- Ladyfinger
- Lae'nas III
- Laen Enkoa
- Laenishul
- Laertes
- Laertes Castle
- Laertian dinar
- Lafayette
- Lafayette class
- Lafe Darin
- Lafleur
- Lagan Serra
- Lagana sector
- Lagg
- Laggal
- Lagoon Nebula
- Lagor
- Lagora
- Lagorian
- Lagos
- Lagrange colony
- Lagrim
- Lahain
- Lahit
- Lahnest
- Lahr
- Lahra
- Lahra (disambiguation)
- Lahra (star)
- Lahra Prime
- Lahra System Patrol
- Lahvishri sh'Ralaavazh
- Lai i-Ramnau tr'Ehhelih
- Laibok
- Laika
- Laikan
- Laiko
- Laiko's spaceship
- Laila Alindogan
- Laira Rillak
- Lajuk
- Lak
- Lak'Nali
- Lak'Nali system
- Lak'Tral
- Lak (planet)
- Lakana
- Lakarian City
- Lakastor Mountains
- Lakat
- Lakatian brandy
- Lake Armstrong
- Lake Cataria
- Lake Devritane
- Lake El-Nar
- Lake Geneva
- Lake Geneva (Warp Delta class)
- Lake Lursor
- Lake Lursor (Boreth)
- Lake Lursor (Qo'noS)
- Lake Lusor
- Lake Masad
- Lake People
- Lake Yuron
- Lake dragon
- Lake flu
- Lake of Latinum
- Lakeland
- Lakeside
- Lakh
- Lakh VII
- Lakina II
- Lakota (disambiguation)
- Lakras
- Laksie
- Laktar
- Lakul (mirror)
- Lakuta
- Lakwa Clothiers
- Lal
- Lal-kang
- Lal-shak
- Lal (24th century Science Officer)
- Lal (Vian)
- Lal (disambiguation)
- Lalairu
- Lalande 21185
- Lalande 25372
- Lale Usbor
- Lalia
- Lam
- Lam (Fayon)
- Lam Leahru-Mar
- Lam Qaf Kha
- Lam Qaf Kha II
- Lamarr class
- Lamat'Ukan
- Lambda
- Lambda Boötis
- Lambda Boötis I
- Lambda Coronae Borealis
- Lambda Crateris
- Lambda Geminorum
- Lambda Paz
- Lambda Scorpii
- Lambda Serpentis
- Lambda Trianguli
- Lambda colony
- Lambda sector
- Lambda system
- Lambert
- Lambert (disambiguation)
- Lamemda
- Lamenda IV
- Lamenda Prime
- Lamenk
- Lamerat Anjen
- Lamerson
- Lamia
- Lamnak
- Lamorian
- Lampan icemonger
- Lampusan
- Lan
- Lan'Tuana sector
- Lan'id Forest
- Lan-dovna
- Lan (disambiguation)
- Lan Cooper
- Lan Kris
- Lana DiCamino
- Lana Shemry
- Lanac
- Lanac VI
- Lanara Diol
- Lanatosian
- Lancaster (disambiguation)
- Lance (starship)
- Lance Cartwright
- Lance Cartwright (mirror)
- Lance McMurphy
- Lance Woods
- Lancefish
- Lancelot
- Land marriage
- Land rover
- Landar the Elder
- Landau
- Landau (disambiguation)
- Landau VII
- Landerrabb
- Landfloater
- Landi
- Landing gear
- Landing party
- Landis
- Landon Cary Dalton
- Landon Ferguson
- Landor
- Landor (planet)
- Landox
- Landras blend coffee
- Landru
- Landru (Betan)
- Landru (computer)
- Landskimmer
- Lane
- Lane (USS Enterprise)
- Lane Crockett
- Laneth, daughter of Garjud
- Lang
- Lang (Ensign)
- Lang (Lieutenant Commander)
- Lang (planet)
- Langely
- Langer XIV
- Langford Walling
- Langmatz Laura
- Langour
- Langsam
- Langston Hughes
- Language
- Langus
- Lanier Wimmer
- Lanitow Irizal
- Lanka-Garukh
- Lanka-gar
- Lankap Mountain Range
- Lankford
- Lanof
- Lanolan
- Lanora class
- Lanroche
- Lanroche VIII
- Lansing
- Lansing (Captain)
- Lansing (Doctor)
- Lant
- Lantar
- Lantar Nebula
- Lantaru sector
- Lanthanide
- Lanthanum
- Lantoid
- Lantos
- Lanugu
- Lanugu's species
- Lanz't Tholis
- Lanza
- Lao shu
- Laoorby 192
- Lap-wadi
- Lapeders sector
- Lapith
- Lapolis
- Laporin
- Lappa
- Lappa IV
- Lapse
- Laptop
- Lar
- Lar'Tok
- Lar'hal class
- Lara
- Lara'atan class
- Lara (Nabu)
- Lara (hunter)
- Lara bird
- Larael
- Larak (disambiguation)
- Larak system
- Laraka
- Larami Comic Strips
- Larami Corporation
- Laraq
- Laraxian berry
- Larc
- Larc Milvin
- Larek
- Larenda
- Larendan Convocation
- Larfleeze
- Large Magellanic Cloud
- Largi Tavrinal
- Largo
- Largo V
- Larhana
- Lari Beltane
- Laria
- Larig
- Larin Nelois
- Laris
- Larisa Chekov
- Larisa Valtane
- Larish Book of Prophecy
- Larish pie
- Larkan
- Larkin
- Larkith
- Larldezz
- Larlux
- Larmos
- Larn
- Larna