- Dark running
- Darkling
- Darkling (episode)
- Darkness
- Darkness Before the Dawn
- Darkseid
- Darl Tavros
- Darla
- Darleen Mastroeni
- Darlen
- Darlene Kursky
- Darlok Ocean
- Darmal
- Darmius
- Darmok
- Darmok (Emperor)
- Darmok (episode)
- Darmok (ship)
- Darmok class
- Darmstadtium
- Darnak VII
- Darnay
- Darnell Renyck
- Daro
- Daro (mirror)
- Daro system
- Darok
- Darok (Klingon)
- Darok (Romulan)
- Daroken
- Darona
- Daronan spring water
- Daros
- Daros IV
- Daroskelar
- Daroskelar Starport
- Darrah Bajin
- Darrah Cheren
- Darrah Hayn
- Darrah Karys
- Darrah Mace
- Darrah Nell
- Darrell
- Darrell (disambiguation)
- Darrell Gervasi
- Darrell Raymond
- Darren
- Darren Ditillo
- Darrin Kane
- Darrinbandi
- Darro
- Darro-Miller Dome
- Darro tree
- Darrow
- Darryl Adin
- Darryl Hawkins
- Darsek
- Darshan
- Darson
- Darsook
- Dart
- Dart-spear
- Dart (CVE-1)
- Dartanian
- Dartboard
- Darts
- Darule
- Darvi Zora
- Darvot
- Darvot fritter
- Darwellian long-tongue
- Darwin
- Darwin (disambiguation)
- Darwin Genetic Research Station
- Darwyn Friel
- Darya Bat-Levi
- Darzen Odan
- Darzun
- Darzun patrol ship
- Das'ri Forest
- Das-Dosiame
- Das Res-Pamudan
- Dasana
- Dasha Verta
- Dasha sector
- Dashaya-Ni'Var
- Dashec
- Dashiell
- Dashiell Hammett
- Dashiki
- Daskel Vabion
- Dassik
- Dast
- Dastaprawson
- Dastera
- Data
- Data's Day
- Data (Captain)
- Data (alternates)
- Data (mirror)
- Data Recovery
- Data Soong
- Data matrix
- Data record
- Data recorder
- Databank
- Datalore
- Datar
- Datara Clouds
- Datarians
- Datawell
- Date
- Dath-toss
- Dath D'lan class
- Dathan
- Dathan Therm
- Dathon
- Datugad
- Datugad native
- Daugu
- Daul Mirosha
- Dauntless
- Dauntless class
- Dauouuy
- Dav
- Dav'ir
- Dava Nikende
- Dava Nikende (mirror)
- Davaar
- Dave Blass
- Dave Brubeck
- Dave Cockrum
- Dave DeGaetano
- Dave Eisenberg
- Dave Galanter
- Dave Glick
- Dave Stern
- Davenesh
- David
- David (biblical)
- David (disambiguation)
- David (statue)
- David A. Goodman (historian)
- David A. McIntee
- David Andrew McCoy
- David Andrew McCoy (mirror)
- David Bailey
- David Baronoff
- David Bernard
- David Bischoff
- David Brett
- David Brooke
- David Cambria
- David Clarke
- David Cohen
- David Combe
- David DeLee
- David Deitrick
- David Derubbio
- David Dvorkin
- David Evans
- David Farragut
- David Fein
- David Follen
- David Forester
- David Frank
- David Galanter
- David Galloway
- David Garrett
- David Garrovick
- David Garrovick (mirror)
- David Gerrold
- David Gian-Cursio
- David Gold
- David Gore
- David Graf
- David Grant Raymond
- David Green
- David Kincaid
- David Levin
- David Livingston
- David Livingston (Captain)
- David Lloyd George
- David Lombardi
- David Mack
- David Marcus
- David Marcus (mirror)
- David Masters
- David McAllan
- David McCammon
- David McCoy
- David Messina
- David Morton
- David Nemzek
- David Prescott
- David R. George III
- David Rabin
- David Ralston
- David Roach
- David Roy (23rd century)
- David Roy (24th century)
- David St. James
- David Stapf
- David Stein
- David Steiner
- David Takemura
- David Tischman
- David Vinson
- David Warner
- David Weddle
- David Williams
- David Witters (23rd century)
- David Witters (24th century)
- David de Winter
- Davide Amici
- Davidoff
- Davidson
- Davidson (USS Enterprise)
- Davidson (USS Yosemite)
- Davidson Leek
- Davidul
- Davis
- Davis (Counselor)
- Davis (Crewman)
- Davis (Doctor)
- Davis (MACO)
- Davis (USS Enterprise-A)
- Davis (USS Enterprise-E)
- Davis (engineer)
- Davis (geologist)
- Davis (security)
- Davis (shuttlecraft)
- Davison
- Davlos
- Davlos III
- Davlos VI
- Davok
- Davon
- Davon III
- Davonia
- Davy Crockett
- Davy Jones
- Dawkins
- Dawn
- Dawn (Human)
- Dawn (episode)
- Dawn (short story)
- Dawn Blair
- Dawn Velazquez
- Dawn of the Eagles
- Dawntali
- Dawntali (23rd century)
- Dawson
- Dawson (disambiguation)
- Dawson Walking Bear
- Dax
- Dax's Comet
- Dax's Comet, Part 1
- Dax's Comet, Part II
- Dax (25th century)
- Dax (26th century)
- Dax (Ensign)
- Dax (Zeosian)
- Dax (episode)
- Dax (symbiont)
- Dax Infinitum
- Dax Pandhi
- Daxal
- Daxar
- Daxura
- Daxxtarian
- Daxxtarian cruiser
- Day
- Day Kannu
- Day of Ascendancy
- Day of Blood, Issue 1
- Day of Blood, Part 2
- Day of Blood, Part 3
- Day of Blood, Part 4
- Day of Blood, Part 5
- Day of Blood (omnibus)
- Day of Honor
- Day of Honor (comic)
- Day of Honor (disambiguation)
- Day of Honor (novelization)
- Day of Rebirth
- Day of the Dove
- Day of the Inquisitors
- Day of the Vipers
- Dayan
- Dayan (disambiguation)
- Dayana Sandoval
- Daylily
- Dayos
- Dayos IV
- Days of Atonement
- Days of Doom
- Daystrom (disambiguation)
- Daystrom A500
- Daystrom Center
- Daystrom Data Concepts
- Daystrom Institute
- Daystrom Institute Journal
- Daystrom M-5-10
- Daystrom One
- Daystrom Operating System
- Daystrom Prize for Holography
- Daystrom scale
- Dayton
- Dayton Ward
- Daytonite
- Dazeeub
- Dazhat
- Dazzo
- Dbil
- Ddraig class
- DeBacco
- DeCandido
- DeCurtis
- DeForest Kelley
- DeLaGuardia Tower
- DeLeon
- DeLeon (Doctor)
- DeLeon (Lieutenant)
- DeMartis
- DePoix
- DeRoos
- DeWitt
- DeYoung
- De Broek
- De Broglie wave
- De Gaulle
- De Gaulle (disambiguation)
- De Gaulle I
- De Gaulle II
- De Gaulle III
- De Gaulle IV
- De Groodt
- De Laroche
- De Shay
- De Sitter space
- Dead Endless
- Dead Man's Hand
- Dead Man's Hand (cards)
- Dead Man's Patch