- CSS Xeno
- CST Beowulf
- CUV Damar (Keldon class)
- CUV Damar (prototype)
- CUV Detapa
- CUV Ghemor
- CUW-8381
- CV-3
- CV-5
- CV-8
- CVA-3
- CVA-5
- CVA-7
- CVA-8
- CVE-3
- CVE-6
- CVL-3
- CVL-6
- CVL-7
- CZ-100
- Caban
- Cabbage
- Caber toss
- Caberhardt
- Cabernet sauvignon
- Cabin E-14
- Cable (disambiguation)
- Cable News Network
- Cable car
- Cabot
- Cabot (Prairie)
- Cabot Erhaftlich
- Cabot class
- Cabral sector
- Cabrius Prime
- Cabrodine
- Cabuy
- Cack
- Cacoa
- Cacophony
- Cada-X
- Cadara
- Cade Bennett
- Cadet
- Cadet's Orientation Sourcebook
- Cadet Kirk
- Cadet Training Facility
- Cadet ship
- Cadet training squad
- Cadge lupus
- Cadi orMalan
- Cadillac
- Cadillac Eldorado
- Cadmium
- Caedera
- Caelian
- Caelian class
- Caeliar
- Caeliar Quorum
- Caeliar gestalt
- Caelum
- Caelum constellation
- Caeminon
- Caen
- Caere
- Caernarvon
- Caerulum
- Caesar
- Caesarean section
- Caesars Palace
- Café Parisienne
- Café Roma
- Café Romano
- Café des Artistes
- Cag
- Cage of Fire
- Cahermad
- Cahill
- Caim Dardis
- Caimar Rouhosa
- Cain (disambiguation)
- Cain I
- Cain II
- Cain system
- Cairn
- Cairn Democracy
- Cairna
- Cairo
- Cairo (disambiguation)
- Cait
- Caithlin Dar
- Caitian
- Caitian (mirror)
- Caitian Claws vanity shield
- Caitian chow
- Caitlin
- Caitlin Barry
- Caius Fesidas
- Caj
- Cajara
- Cajitar IV
- Cake
- Cal-Tech Prep
- Cal-tai
- Cal Hudson
- Cal Hudson (mirror)
- Cal Kebron
- Calabrese
- Calabria
- Caladan Mountains
- Caladan class
- Caladia
- Calaiah vel D'nai
- Calaman sherry
- Calamarain
- Calan
- Calanara
- Calanista
- Calari
- Calas
- Calash
- Calash retreat
- Calavet
- Calber
- Calbriden
- Calbriden Prime
- Calcium
- Calculanthra
- Calculated Risk
- Calculator
- Calculus
- Calda class
- Calder
- Calder (Lieutenant)
- Calder (disambiguation)
- Calder II
- Calder II outpost (22nd century)
- Calder II outpost (24th century)
- Calder Prime Shipyard
- Calder sector
- Calderisi
- Calderisi homeworld
- Calderisi raider
- Calderon
- Caldik
- Caldik Prime
- Caldonia
- Caldonia (planet)
- Caldonia III
- Caldonian
- Caldonian ensign
- Caldonians
- Caldorian
- Caldos
- Caldos II
- Caldos colony
- Caleb B. Smith
- Caleb IV
- Caleb IV outpost
- Calebrian plague
- Caledon
- Caledon (disambiguation)
- Calendar
- Calentar
- Calentar (planet)
- Calgary (disambiguation)
- Calgary (planet)
- Calhoun
- Cali
- Caliban
- Caliban (Rampartian)
- Calibus
- Calibus VII
- Calid
- Calidan
- Calidan III
- California
- California Institute of Technology
- California class
- Californium
- Caligula
- Calila Vod
- Calin
- Calindra
- Calindra (Narcine class)
- Calindra (disambiguation)
- Caliph
- Caliph IX
- Calitos Brennus
- Calix
- Calix colony
- Calka
- Call Back Yesterday
- Call Back Yesterday (RPG)
- Call to Arms
- Call to Arms...
- Call to Arms (CCG)
- Call to Arms (STO)
- Call to Arms (episode)
- Callas
- Called Home
- Callie
- Calligar
- Callinon
- Callinon VII
- Callinon relay station
- Callinon sector
- Calliope
- Callis Neve
- Callista
- Callisto
- Callisto (disambiguation)
- Callor
- Callor V
- Calloway
- Calloway (disambiguation)
- Calm Amidst the Storm
- Calondia IV
- Calondon
- Calphan
- Calrissia
- Calrissian chameleon
- Calsa
- Caltarian
- Calthos
- Calthos III
- Calufrax
- Calufrax IV
- Calvin
- Calvin (disambiguation)
- Calvin Hutchinson
- Calvin Moore
- Calvin Renn
- Calvin Sutherland
- Calvinum
- Calvinus
- Calvinus (Centurion class)
- Calvinus (Cetratus class)
- Calvinus (Gladius class)
- Calvinus (Patronus class)
- Calvinus (Securis class)
- Calydon
- Calydon (planet)
- Calypso
- Calypso (Cousteau)
- Calypso (ISS Enterprise-D)
- Calypso (USS Enterprise-D)
- Calypso (USS Enterprise-E)
- Calypso (dance)
- Calypso (episode)
- Calyx
- Cam
- Cam (disambiguation)
- Camacho
- Cambela
- Cambelian
- Cambelian system
- Cambodia
- Camborn Sector Alliance
- Camborn sector
- Cambra
- Cambridge
- Cambridge (disambiguation)
- Cambridge (transport)
- Cambridge University
- Cambrog
- Camel
- Camel (asteroid)
- Camelephant
- Camelopardalis
- Camelot (planet)
- Camenae
- Camera
- Cameron's World
- Cameron Diaz
- Cameron Vortex
- Camila Schiapp
- Camille Argus
- Camille Hawk
- Camor V
- Camouflage hologenerator
- Camp Camelot
- Camp Khitomer
- Campagna Station
- Campaign at Kol'Vat
- Campan sector
- Campbell
- Campbell's World
- Campbell (Captain)
- Campbell (shuttlepod)
- Campbell Roberts
- Camphor dung
- Campio
- Campor
- Camraz Zubeeri
- Camus
- Camus (disambiguation)
- Camus II
- Can'id'r
- Can opener
- Canada
- Canada class
- Canamar (episode)
- Canara
- Canaris (disambiguation)
- Canaris (planet)
- Canary Wharf
- Canasta
- Canberra
- Cancer
- Cancer (disease)
- Cancer constellation
- Canchika
- CancĂșn
- Candar
- Candela (disambiguation)
- Candela system
- Candelar
- Candelar IV
- Candelaran
- Candessa
- Candice Uyloan
- Candida
- Candide (planet)
- Candido
- Candlestick Auditorium
- Candra Avitts
- Candus Fugo
- Candus Fugo (23rd century)
- Candus Fugo (24th century)
- Candy-tufted mud fungus
- Candy Millester
- Canes Venatici
- Canfield
- Canfield-type piezoelectric material
- Canias
- Canis
- Canis IV
- Canis Major constellation
- Canis Major region
- Canis Minor constellation
- Canis Minoris XII
- Canis Minoris system
- Canka nut
- Canker