- Krit, son of Antaak
- Kritela
- Krith
- Kritkraw
- Kriton
- Kritora
- Krivaq, son of Gorv
- Kriz, son of K'Mat
- Krnsandor L'am
- Krocton Segment
- Krocton Segment (mirror)
- Krodak
- Krodu
- Krogan
- Krognik demon
- Kroida
- Kroiha
- Kroitz
- Krokaa
- Krollage
- Krolom-792
- Krom
- Krominer
- Kromlan
- Kromnoth sector
- Kron
- Kron (Commander)
- Kron (Malon)
- Kron (officer)
- Krona
- Krong
- Kronim
- Kronin
- Kronner
- Kronos class
- Kropasar
- Kropasar Journal of Applied Biotechnology
- Kropaslin
- Kropaslin Curia
- Kros
- Kross
- Krotag
- Krotar
- Krotus
- Krov
- Krovill
- Krowtonan Guard
- Krox tai Rovashi
- Krox vestai Drexa
- Kroy
- Kroy's planet
- Kroy's system
- Kroykah
- Krozek
- Krozh
- Krueger
- Krueger (USS Enterprise-F)
- Krueger (USS Ranger)
- Krugar III
- Kruge
- Kruger
- Kruger (disambiguation)
- Kruller
- Krulmadden
- Kruq
- Krusea
- Krusk
- Krutu
- Krutuvub
- Kruva
- Kryan, son of Panich
- Krychek
- Krychek VI
- Krylon
- Krylon XI
- Kryo
- Kryodus
- Kryonian tiger
- Krypton
- Kryt
- Krytak
- Kryton
- Kryton (mirror)
- Ksahtryan Regime
- Ksanna MacDonald
- Ksenneta
- Ktaria
- Ktaria VII
- Ktarian
- Ktarian Enclave
- Ktarian chocolate puff
- Ktarian egg
- Ktaris
- Ktorr Skann
- Ktorran
- Ku
- Ku'Vel'Di
- Ku'ltan
- Ku't
- Ku'thei
- Ku (Kelvin timeline)
- Ku (disambiguation)
- Kuala Lumpur
- Kuazurr
- Kuban
- Kubaro Dickerson
- Kubia
- Kubichi
- Kubichi system
- Kubla Khan
- Kubus Oak
- Kubus Pohl
- Kubus Pohl (mirror)
- Kuchuk
- Kuda
- Kudak'Etan
- Kudao
- Kuderian Guard
- Kudesh
- Kudzu
- Kufap
- Kufey
- Kugel
- Kuhrrat
- Kuilka
- Kuiper
- Kuiper Belt
- Kuiper belt
- Kuja fly
- Kujal
- Kujalan
- Kuk-pak
- Kukalaka
- Kukar
- Kukiam
- Kukulkan
- Kukulkan's species
- Kukulkan's starship
- Kukurydza
- Kul
- Kul'Cha'Vir
- Kulan
- Kulat
- Kuldip
- Kulef nd'Orelag
- Kulei Aephas
- Kulessa
- Kulian
- Kulinarr
- Kulinor class
- Kuljit Patel
- Kull
- Kullnark
- Kulloth
- Kulok
- Kulshedra class
- Kultan
- Kuluuk
- Kumagai
- Kumamoto
- Kumar
- Kumari
- Kumari (ice cutter)
- Kumari (mirror)
- Kumari class
- Kumas
- Kumasi
- Kumburan
- Kunan Olfi
- Kunas
- Kunex
- Kung
- Kung (23rd century)
- Kung (24th century)
- Kunial
- Kuniko Mizuki
- Kunimitsu Okano
- Kunkel
- Kupnil
- Kura
- Kurak, daughter of Haleka
- Kurak, daughter of Haleka (mirror)
- Kural
- Kurali
- Kurat
- Kurat Mountain Range
- Kurat Temple Complex
- Kurchatovium
- Kureus
- Kurga
- Kuri
- Kuri Dennings
- Kurill I
- Kurill III
- Kurill Prime
- Kurill sector
- Kurkjian Memorial Hospital
- Kurl
- Kurlan
- Kurlan naiskos
- Kurn, son of Mogh
- Kurn (disambiguation)
- Kurn (mirror)
- Kurn (weapons officer)
- Kurna fruit
- Kurning
- Kuron
- Kuron (Kelvin timeline)
- Kuron system
- Kuros
- Kurper
- Kurpol
- Kurr
- Kurrgo
- Kurs
- Kursley
- Kurt
- Kurt (disambiguation)
- Kurt Bendera
- Kurt Davis
- Kurt Hansen
- Kurt Hunter
- Kurt Mandl
- Kurt Redd
- Kurt Wagner
- Kurtz
- Kuruk-Tau
- Kurvanis
- Kusdor
- Kusiun
- Kut
- Kut'luch
- Kutabi
- Kutan zantai-Lisson
- Kutel Esad
- Kuthar class
- Kuu'iut
- Kuumaarke
- Kuumaarke (mirror)
- Kuun
- Kuut
- Kuvah'magh
- Kuvak
- Kuvak (disambiguation)
- Kuvalex vestai Reshtarc
- Kuvrak
- Kuxam
- Kuztor
- Kvaad
- Kveld
- Kwaheri
- Kwahu
- Kwan
- Kwan-mei Suarez
- Kwan (disambiguation)
- Kwarlez
- Kwejian (planet)
- Kwejian frigate
- Kwelm
- Kwettir
- Kwil'inor
- Kwolek
- Kwy
- Ky'Dra
- Ky'rha
- Ky'rha Artifacts
- Ky'rok
- Kyana
- Kyana II
- Kyana Prime
- Kyeera Janyl
- Kyepas Coast
- Kyethn Zund
- Kyla VanZyl
- Kylarghian fire gem
- Kyle (disambiguation)
- Kyle Anderson
- Kyle Baron
- Kyle Courter
- Kyle DeSoto
- Kyle DeSoto (mirror)
- Kyle McKenna
- Kyle Plummer
- Kyle Riker
- Kyle Riker (mirror)
- Kyle Toucher
- Kyle Wilson
- Kylen
- Kyli Shon
- Kylin'the
- Kyljoi
- Kyll
- Kylo orchid
- Kylor
- Kylor (Klingon)
- Kylor (Romulan)
- Kynardi
- Kynsleve
- Kyo-Ina
- Kyona
- Kyoshi Nogura
- Kyoto
- Kyoto (DX-103)
- Kyoto (disambiguation)
- Kyoto Imperial Palace
- Kyr
- Kyr Nostrand
- Kyrasam
- Kyraw
- Kyraw homeworld
- Kyriakides
- Kyrian
- Kyril
- Kyros
- Kyros (disambiguation)
- Kyros system
- Kyrosian
- Kyrtu
- Kytharri
- Kytherian crab
- Kyzella Outpost
- Kzinkiller
- Kzinslayer
- Kzinti
- Kzinti fighter
- Kzinti warship
- L'Aquila
- L'Astrance
- L'Deus
- L'Dira
- L'Gon
- L'Haan
- L'Haan (mirror)
- L'Kem
- L'Kor
- L'Lewoh
- L'Miren
- L'Nar
- L'Nel
- L'Nel (22nd century)
- L'Nel (23rd century)
- L'Rell
- L'Rell (mirror)
- L'Sen
- L'Teis Kardashev