- Grozit
- Grrav'en
- Gru Daraan
- Grub meal
- Grudge
- Grudzeqi
- Gruel
- Gruhn Helkara
- Grul
- Grumir
- Grumpackian tortoise
- Gruner
- Grunnil
- Grup
- Grus
- Grus constellation
- Gruyakin
- Gruyakin VI
- Grymi
- Grymi Says He's Sorry
- Gryphon class
- Gryphon class (escort)
- Grün
- Gsellman
- Guadalupe Gomez
- Guam
- Guanethidine
- Guangzhou
- Guanon
- Guaranteed personal income
- Guarav
- Guard
- Guard beast
- Guardian
- Guardian (CA-14)
- Guardian (Dreman)
- Guardian (Valzhan)
- Guardian caste
- Guardian class (cruiser)
- Guardian class (frigate)
- Guardian of Forever
- Guardians
- Guardians Errant
- Guarding Your Investment, Keeping Your Children Profitable
- Guardship
- Guardsman
- Guardsman (Andorian)
- Guardsman (Orion)
- Guarnerius
- Gubbin
- Gubeyib
- Guenther
- Guenther I
- Guenther I-A
- Guenther I-B
- Guerette
- Guernik
- Guh
- GuiMon in Chief of the Ferengi Alliance
- Guidance system
- Guide for the Oralian Way
- Guided weapons battlecruiser
- Guided weapons destroyer
- Guided weapons frigate
- Guidelines
- Guidon
- Guidon Space Pontificate
- Guild of Healers
- Guillermo Masada
- Guilpin Region
- Guinan
- Guinan (mirror)
- Guindon
- Guinea pig
- Guingouin
- Guinness
- Guinness cake
- Guises of the Mind
- Guitar
- Gul
- Gul-tar
- Gul Vystan class
- Gula River
- Gulag
- Gulal (mirror)
- Guldammur
- Guldammur IV
- Guldin
- Gulf Coast
- Gulf of Mexico
- Gulf oil spill
- Gulied
- Gulliver's Fugitives
- Gulliver's Travels
- Gullrey
- Gulvaria
- Gulvaria VI
- Gum Nebula
- Gumato
- Gumbo
- Gumbo (short story)
- Gumdrop
- Gummex
- Gummy Kos'karii
- Gun
- Gunabibi
- Gunabibi (tribe)
- Gunarp
- Gunboat
- Gundara
- Gundersdotter's Dome
- Gundersdottir's Dome Rebellion
- Gunderson
- Gundin
- Gunji jackdaw
- Gunnd
- Gunner (Kzinti)
- Gunnery sergeant
- Gunpowder
- Gunther
- Guo Shoujing
- Guoifau
- Gura
- Gura system
- Guramba
- Guramba (disambiguation)
- Gurat'urak
- Gurava sector
- Gurgey
- Gurlag
- Gurlk, son of Krom
- Gurn
- Guroth
- Gurud Islands
- Guruk Dolim
- Gus
- Gus'Tavi
- Gus'Tavi system
- Gus (disambiguation)
- Gus (planet)
- Gus Barnes
- Gus Grissom
- Gus Harrison (23rd century)
- Gus Harrison (24th century)
- Gus Lloyd
- Gustav
- Gustav Blaisdell
- Gustav Johan
- Gustav Jorgenssen
- Gustav Larssen
- Gustavo Emmanuelli
- Gutfish
- Guthrie
- Gutiv
- Guul
- Guy
- Guy Albery-Aleissa
- Guy Gardner
- Guy Marlow
- Guy W. McLimore, Jr.
- Guy of Gisbourne
- Guys and Dolls
- Gwarz
- Gweemo
- Gweemo's Lobemaster
- Gwen
- Gwen (disambiguation)
- Gwen Jones
- Gwen Nu (23rd century)
- Gwen Nu (24th century)
- Gwendal Stadi
- Gwendolyn
- Gwendolyn Plante
- Gwyn
- Gwyn (Trill)
- Gwyn (disambiguation)
- Gwynhyfarr
- Gwynyth Walsh
- Gyani
- Gydian
- Gyero Minza
- Gyffled
- Gym
- Gymnastics
- Gypsy
- Gypsy World
- Gyrik
- Gyronian wamule
- Göller
- H'Atoria
- H'Lisset
- H'Mupal
- H'Rez
- H'Ta, son of Kahmar
- H'a'e'd't'd'o'i'r
- H'aareld va Groth'Chok
- H'atoria
- H'atoria (planet)
- H'atoria Station
- H'atoria sector
- H'atoria system
- H'ban Pav class
- H'daen tr'Khellian
- H'ippo
- H'jn Sowell
- H'lor
- H'relgath River
- H'ren
- H'renn
- H'rewiss
- H'rol Hyrnn
- H'rrora
- H-28365
- H-28365 (Hayre Expanse)
- H-28365 (Lantaru sector)
- H-54786
- H-72579
- H-91876
- H.G. Wells
- H.G. Wells Crater
- H. Narita
- H. Osterman
- H. Palomar
- H. Zimmerman
- H0S13
- H0Y67
- H1A87
- H1F89
- H1M36
- H1N76
- H1Q32
- H2B74
- H2H44
- H3P86
- H4E23
- H4L09
- H4M85
- H4T65
- H5H18
- H5KHY
- H5V63
- H5Y10
- H6D20
- H6F54
- H6G88
- H6R53
- H7F84
- H7N76
- H7O98
- H8190
- H8G65
- H8J54
- H8Z36
- H9G98
- H9I81
- H9M76
- H9M94
- HD047-08054
- HD047-08450
- HD047-10564
- HD047-15145
- HD047-16054
- HD047-16458
- HD047-47850
- HD047-48084
- HD047-48469
- HD047-48486
- HD047-68405
- HD047-69696
- HD047-78456
- HD047-78466
- HD047-80584
- HD047-84015
- HD047-84055
- HD047-84264
- HD047-89416
- HD047-94535
- HD047-96569
- HD047-98259
- HD047-98741
- HD047-99456
- HHV Olarra
- HHV Rhev
- HHV Stalker
- HHirl
- HL-119
- HL-1358
- HL-416
- HMS Beagle
- HMS Bounty
- HMS Dreadnought
- HMS Enterprise
- HMS Enterprise (1787)
- HMS Enterprise (surveyor)
- HMS Enterprize
- HMS Enterprize (mirror)
- HMS Lord Nelson
- HMS New Zealand
- HMS Swansong
- HMS Thunder Child
- HMS Victory
- HRN Valparaiso
- HSC-2
- HSC-3
- HSC-5
- HSC-6
- Ha'apax class
- Ha'feh class
- Ha'mara
- Ha'mara (short story)
- Ha'nom class
- Ha'rt M'ullhy
- Ha'van
- Ha rageel
- Haadok
- Haaihue
- Haak Trobis
- Haakon
- Haakon (disambiguation)
- Haakon (planet)
- Haakona
- Haakona (disambiguation)
- Haakona Prime
- Haakona class
- Haakonan
- Haakonian
- Haakonian Order
- Haarv
- Hab
- Hab'neth
- Habablathh
- Habah
- Habak
- Habburitic Code
- Habitable zone
- Habitat ring
- Habnagh
- Habrenn
- Hackard
- Hacker
- Hackworth
- Hacom
- Hadachi
- Hadaen D'Mora
- Hadar (Cardassian)