- Christopher Pike (Kelvin timeline)
- Christopher Pike (alternates)
- Christopher Pike (mirror)
- Christopher Pike (mirror Kelvin timeline)
- Christopher Pike Medal of Valor
- Christopher Pimental
- Christopher Rousseau
- Christopher Turpin
- Christopher Wren
- Christopher class
- Christopher family
- Chromatin
- Chrome-5
- Chromin
- Chromium
- Chromosome
- Chronal Assessment Committee
- Chrondrite echo
- Chronian
- Chronian III
- Chronicles of War
- Chronister
- Chroniton
- Chroniton generator
- Chroniton torpedo
- Chronitonic sensor
- Chrono-deflector
- Chronological Defense Corps
- Chronologist
- Chronometer
- Chronometric radiation
- Chronon
- Chronos class
- Chronotron
- Chronotropic fragment
- Chronovore
- Chronowerx Corporation
- Chrysalis
- Chrysalis (episode)
- Chrysalis (novel)
- Chrysalis Base
- Chrysalis Project
- Chrysalis system
- Chrysler Building
- Chryso
- Chryson
- Chryson I
- Chryson II
- Chu'Hegh'TlhoS
- Chu'lak
- Chu'lak (mirror)
- Chu'paq Sea
- Chu'wI'Hey
- Chu-sa
- ChuDegh
- ChuLor
- ChuS'ugh
- ChuSwI'
- Chu Edorlic
- Chuan-chi
- Chuch bIQDep
- Chuchaki
- Chuck
- Chuck Anderson
- Chuck Liese
- Chuck Yeager
- Chuft-Captain
- Chula
- Chula (disambiguation)
- Chula hall
- Chulak
- Chulak's planet killer
- Chulan
- Chulan System Patrol
- Chumarr
- Chumbra
- Chumbra III
- ChunDab class
- ChunI'Huq
- ChunI'Huq I
- ChunI'Huq II
- ChunI'Huq III
- ChunI'Huq IV
- Chung
- Chung (Admiral)
- Chung (Captain)
- Chuniikite
- Chuq'Beh class
- Church of the Love of the Fates
- Churchill
- Churchill system
- Churen
- Churl
- Churt
- Chut
- Chutok class
- Chuu'iik Hru'uith
- Chwolkk
- Chynne
- Chyrellka
- Château Picard
- Château Thelian
- Château de Saint Brisson
- Ci'Nent V
- Ciatella
- Cibola
- Cicada
- Cicada sector
- Cicadian Suite No. 9
- Cicero
- Cidasi
- Cigar
- Cigarette
- Cilas
- Cilas XII
- Cilia
- Cillers
- Cilya
- Cimera
- Cimera III
- Cincinnatus
- Cinda-Ru
- Cinderella
- Cindrich
- Cindy
- Cindy (disambiguation)
- Cindy Appel
- Cineen
- Cinera
- Cing'ta
- Cinnamon
- Cino Desdin
- Cintar
- Cintron
- Cioffi
- Cipher level D
- Cipher level F
- Cipriano
- Cir-cen
- Circe
- Circe (disambiguation)
- Circe (myth)
- Circe II
- Circe V
- Circe system
- Circinus
- Circle (Tarn)
- Circle Commission
- Circle of Listeners
- Circles within Circles
- Circuitry
- Circular Sea
- Cirini
- Cirini II
- Cirini Prime
- Cirok
- Ciros
- Cirran Mountains
- Cirrus IV
- Cissaca
- Cita Laga
- Citadel
- Citadel (Cardassia)
- Citadel Var'Theldun
- Citadel class
- Citation
- Citation of Conspicuous Gallantry
- Cities of Refuge
- Cito
- Citron III
- City
- City Life
- City Oval
- City Watch
- City builder
- City of B'hala
- City of the Dead
- City of the Thousand Lights
- City on the Edge of Never
- Civeu
- Civil Conversation
- Civil Defense
- Civil Disobedience
- Civil Guard
- Civil war
- Civilian
- Civilian Assembly
- Civilian leader
- Civilian shuttle
- Civilian starship
- Civilization (episode)
- Civita
- Cl'cli'cl
- Cl'mntin
- Clado
- Clagg
- Claiborne Henry
- Claire
- Claire Eddy
- Claire Thorn
- Clamda
- Clampett
- Clan (Vulcan)
- Clan Briphachi
- Clan Ghe'Hara
- Clan Hgrtcha
- Clan Iggrazo
- Clan K'vek
- Clan Kaveth
- Clan McNee
- Clan Phelsht
- Clan Ru
- Clan Shaman
- Clan Wars
- Clan Wolf
- Clan nest
- Clan of Combat
- Clan of Enforcers
- Clan of the Eye
- Clancy
- Claneia
- Clanhaven 1
- Clapp (USS Enterprise-D)
- Clapshot
- Clara
- Clara (disambiguation)
- Clara Bernstein
- Clara Nieve
- Clara Nieve I
- Clare Raymond
- Claremont
- Clarinoxamine
- Clarion
- Clarissa Glenn
- Clarissa Nyn
- Clark
- Clark (Admiral)
- Clark (Captain)
- Clark (Ensign)
- Clark (Starbase 88)
- Clark (USS Defiant)
- Clark (medic)
- Clark (security)
- Clark Canyon
- Clark Colony
- Clark Dempsey
- Clark Dodson (23rd century)
- Clark Dodson (24th century)
- Clark Gable
- Clark Kent
- Clark Terrell
- Clark Terrell (Kelvin timeline)
- Clarke's Abyss
- Clarke's Disease
- Clarke's Star
- Clarke (Cadet)
- Clarke (Lieutenant)
- Clarke (shuttlecraft)
- Clarke class
- Clarke class (25th century)
- Clarus
- Clarus IV
- Clarus IX
- Clarze
- Clash on the Fire Plains
- Class-10 probe
- Class-1 probe
- Class-2 probe
- Class-3 probe
- Class-4 probe
- Class-5 probe
- Class-6 probe
- Class-7 probe
- Class-8 probe
- Class-9 probe
- Class 11 nebula
- Class 12 nebula
- Class 17 nebula
- Class 1 nebula
- Class 2 nebula
- Class 2 shuttlecraft
- Class 3 nebula
- Class 9 nebula
- Class A
- Class A gas giant
- Class A geothermal planet
- Class B
- Class B gas giant
- Class B geomorteus planet
- Class C
- Class C geoinactive planet
- Class C reducing planet
- Class C shuttlecraft
- Class D planet
- Class E planet
- Class F
- Class F geocrystalline planet
- Class F geometallic planet
- Class F planet
- Class F shuttlecraft
- Class G
- Class G geocrystalline planet
- Class G silicate planet
- Class H desert planet
- Class H shuttlecraft
- Class III
- Class III planet
- Class III starship
- Class II starship
- Class IV starship
- Class IX starship
- Class I gas supergiant
- Class I starship
- Class J
- Class J cargo ship
- Class J gas giant
- Class J nebula
- Class J starship
- Class K
- Class K nebula
- Class K silicate planet
- Class K transjovian planet
- Class L planet
- Class M
- Class MZ planet
- Class M (disambiguation)
- Class N
- Class N reducing planet
- Class O
- Class O planet
- Class P planet
- Class Q planet
- Class R
- Class R planet
- Class Reunion
- Class S-4 shuttlecraft
- Class S planet
- Class T
- Class T nebula
- Class T planet
- Class T technology
- Class VIII starship
- Class VII starship
- Class VI starship
- Class V starship