- Denebian snail
- Denebian watertrumpet
- Denem
- Deneva
- Deneva Deception
- Deneva Defense
- Deneva Research Station
- Deneva Shipyards
- Deneva class
- Denevan
- Denevan Colonial Museum
- Denevan crystal
- Denevan dogwood
- Denevan plum pudding
- Denevan starship
- Denevan whiskey
- Dengella
- Dengella II
- Deni
- Denial of Destiny
- Denigarro
- Denik Alash
- Denis Sun-Toucher
- Denise (disambiguation)
- Denise Crosby
- Denise Lankford
- Denise Okuda
- Denise Okuda (Starfleet)
- Denise Quinn
- Denise Raymond
- Deniskar Treyna
- Denison Morad
- Denius
- Denkir
- Denkir (disambiguation)
- Denkir system
- Denmark
- Denmark (disambiguation)
- Dennas
- Dennehy
- Denning
- Dennis (disambiguation)
- Dennis Bailey
- Dennis Caelestis
- Dennis Calero
- Dennis Chimelis
- Dennis Decker
- Dennis Gardenhire
- Dennis Russell
- Dennis Sweeney
- Dennis and Young Amalgamated
- Dennisar
- Dennit
- Denny Martin Flinn
- Denobula
- Denobula Prime
- Denobula Station
- Denobula Triaxa
- Denobulan
- Denobulan (mirror)
- Denobulan Curia
- Denobulan freighter
- Denobulan sector
- Denobulan warship
- Denocet
- Denocet Prime
- Denocet Prime Shipyard
- Denor Wat
- Denoray Lunas
- Denorex
- Denorian groundnut
- Denorios
- Denorios (interceptor)
- Denorios (mirror)
- Denorios Belt
- Denro
- Denro IV
- Densori's Landing
- Densri
- Denticle
- Denton
- Denton Greenbriar
- Denton J. Tipton
- Dentrivan
- Denuvian
- Denveer Cotes
- Denver
- Deny Thy Father
- Dep'reth
- DepIp
- DepIp I
- DepIp II
- DepIp III
- Department of Advanced Research
- Department of External Audits
- Department of Extra-Vulcan Research
- Department of Homeland Security
- Department of Humanoid Resources
- Department of Liquidation
- Department of Temporal Affairs
- Department of Weather
- Department of the Outside
- Deployable practice target
- Deppi An
- Depression
- Depruu Grub Emporium
- Deputy
- Deputy Arbiter
- Deputy Commissioner for Interspecies Affairs
- Deputy Federation Security Advisor
- Der'Nath
- Der'neth
- Dera System Patrol
- Deral
- Derbes
- Derek
- Derek (disambiguation)
- Derek Brentwood
- Derek Chester
- Derek Fried
- Derek Garth
- Derek Hahn
- Derek Redmond
- Derek Tyler Attico
- Derek Waverly
- Derell
- Derellian seaslug
- Deren'dex
- Derenja
- Derenja V
- Deresi
- Deresus class
- Derex
- Derf
- Derf class
- Deriben
- Deriben V
- Derin
- Derish Koln
- Derix
- Derl
- Dermal regenerator
- Dermatiraelian plastiscine
- Dermot Cusack
- Dern
- Dern (conn)
- Derna
- Derna incident
- Dernovin
- Dero
- Dero Gohdon
- Deron Warner
- Derro
- Dershowitz
- Deru
- Derus VI
- Derval Avoca
- Dervish
- Dervish (disambiguation)
- Dervish class
- Derwell Kant
- Deryl Skelton
- Derym
- Der’Nath
- Des'Reval Mountains
- DesYog
- Desai
- Desai (disambiguation)
- Descendant
- Descendants
- Descent
- Descent of the Pahwraiths
- Descheeni
- Desealing rod
- Desegranine
- Deserak Wilderness
- Desert
- Desert Crossing
- Desert Path
- Desert silk flies
- Deshinar Tibbonel
- Desiccated Collectibles Market
- Designing Starships
- Designing the Final Frontier
- Desilu Studios
- Desire Island
- Desius
- Desjardin (disambiguation)
- Deskereb
- Desma
- Desma Yarrow
- Desmoulins
- Desna
- Desperate Hours
- Desperate Measures
- Despite Yourself
- Dessev
- Dessica
- Dessica II
- Dessin-ka
- Desslsra
- Desta
- Destaine
- Destan
- Destin
- Destination... Annihilation!
- Destiny
- Destiny (STO)
- Destiny (episode)
- Destiny class
- Destroyer
- Destruction of Deep Space 9
- Destruction of Praxis
- Destruction of Praxis (Kelvin timeline)
- Destruction of Romulus
- Destruction of Vulcan
- Detachment
- Detained
- Detaith
- Detapa Council
- Detective
- Deter-fly
- Determination
- Determination (process)
- Deth O'Kay
- Detok
- Detrek
- Detria
- Detria II
- Detria VI
- Detroit
- Detronium
- Deuridium
- Deuterium
- Deuterium injector
- Deuterium tank
- Deuteron
- Deutronium
- Deutsch
- DevIygh
- DevIygh I
- DevIygh II
- Dev Vo'Qul
- Dev blog
- Devar
- Devara
- Devari
- Development patch
- Developmental Deviations Unit
- Devereaux
- Devereaux (Ensign)
- Devereaux (Starbase 27)
- Deveride
- Devi Patel
- Deviations
- Devices and Desires
- Devico
- Devidia II
- Devidian
- Devidian Lord
- Devidian system
- Devil
- Devil's Bargain
- Devil's Brew
- Devil's Choice
- Devil's Downfall
- Devil's Due
- Devil's Due (Phase II)
- Devil's Heart
- Devil Down Below!
- Devil Wars
- Devil World
- Devil class
- Devil in the Sky
- Deviled potatoes
- Devinel Vod
- Devious
- Devir
- Devisor
- Devix
- Devla Fol
- Devlin Connolly
- Devna
- Devnar
- Devnar IV
- Devniad
- Devolin
- Devon
- Devon (disambiguation)
- Devon Raymond
- Devona
- Devona IV
- Devonian
- Devonshire Excavation
- Devoras
- Devoras Division
- Devoras Narviat
- Devoras planet
- Devore
- Devore Imperium
- Devore Prime
- Devore attack cruiser
- Devore sector
- Devore warship
- Devorren
- Devos
- Devos II
- Devotion
- Devotionalists
- Devritane Museum
- Devro
- Devron
- Devron (disambiguation)
- Devron II
- Devron sector
- Dewa
- Dewan
- Dewan arthropod
- Dewey (disambiguation)
- Dex (disambiguation)
- Dex Daraan
- Dexa
- Dexar
- Dexel
- Dexi-penithal
- Dexitrin
- Dexter
- Dexter (20th century)
- Dexter Armbruster
- Dexter Remmick
- Dextera 273
- Dextramethametroheblezine
- Dexus II
- Dey
- Deycen
- Deyin Kaiyel-Ned
- Deyllar
- Deyreth Elt
- Dezago
- Dezhe
- Dezinor
- Deznah
- Dezomin
- Dezrai
- Dhael class