- Mel Crawford
- Mel Gilden
- Mel Mellis
- Mel Mellis (23rd century)
- Mel Nis
- Melakon
- Melakon (mirror)
- Melanex
- Melanex B
- Melani D'ian
- Melanie
- Melanie Cain
- Melanie Martinez
- Melanth
- Melchior
- Meld
- Meldir
- Meldok
- Meldok (engineer)
- Meldok (medic)
- Meldrar
- Meldrar I
- Meldrar Prime Shipyard
- Meldrarg
- Melekh
- Melgood
- Melik
- Melik (Klingon)
- Melik V
- Melikaz
- Melila
- Melina
- Melina II
- Melina system
- Melinda
- Melinda Rebovich
- Melinda Snodgrass
- Melissa Crandall
- Melissa Dickinson
- Melissa Keel
- Melissa Moy
- Melissa Scott
- Melkinat
- Melkis
- Melkor, son of G'Iogh
- Melkot
- Mellanoid slime worm
- Mellim
- Mellim Vri
- Mellon
- Melnis
- Melnyk
- Melo
- Melody Sawyer
- Melon
- Melona
- Melona IV
- Melony
- Melora
- Melora Pazlar
- Melora Pazlar (mirror)
- Melorazine
- Melorix
- Melorr
- Melota
- Melpomene Players
- Melponar
- Melponar class
- Meltdown Nihilism
- Meltha
- Melting Pot
- Melville
- Melvin Nebula
- Mem'sir
- Memas
- Meme virus
- Memento Mori
- Memh
- Memoir
- Memoirs of an Invisible Ferengi
- Memorable Room of the Grand Couch
- Memorial
- Memorial (episode)
- Memorial Deck
- Memorium
- Memory
- Memory (starship)
- Memory Alpha
- Memory Beta
- Memory Beta Chronology
- Memory Beta Chronology: 20th Century
- Memory Beta Chronology: 2150s
- Memory Beta Chronology: 21st Century
- Memory Beta Chronology: 2220s
- Memory Beta Chronology: 2230s
- Memory Beta Chronology: 2240s
- Memory Beta Chronology: 2250s
- Memory Beta Chronology: 2260s
- Memory Beta Chronology: 2270s
- Memory Beta Chronology: 2280s
- Memory Beta Chronology: 2290s
- Memory Beta Chronology: 22nd Century
- Memory Beta Chronology: 2300s
- Memory Beta Chronology: 2310s
- Memory Beta Chronology: 2320s
- Memory Beta Chronology: 2330s
- Memory Beta Chronology: 2340s
- Memory Beta Chronology: 2350s
- Memory Beta Chronology: 2360s
- Memory Beta Chronology: 2370s
- Memory Beta Chronology: 2380s
- Memory Beta Chronology: 23rd Century
- Memory Beta Chronology: 24th Century
- Memory Beta Chronology: 25th Century
- Memory Beta Chronology: Distant Past
- Memory Beta Chronology: Far Future
- Memory Beta Chronology: Recent Past
- Memory Delta
- Memory Epsilon
- Memory Gamma
- Memory Lane
- Memory Omega
- Memory Prime
- Memory Prime (novel)
- Memory bank
- Memory unit
- Memory wipe
- Memoxa
- Mempa
- Mempa II
- Mempa IV
- Mempa IX
- Mempa Knife Duel
- Mempa V
- Mempa VII
- Mempa VIII
- Mempa sector
- Mempan
- Memphis
- Memphis (disambiguation)
- Men
- Menace of the Moloth
- Menachem Jahzeel
- Menak
- Menalvagor
- Menao Sheme
- Menas Baari
- Menax tai-Vroden
- Mench
- Mendar
- Mendebelan
- Mendel
- Mendel (shuttlecraft)
- Mendeleev Crater
- Mendelevium
- Mendez
- Mendez (Admiral)
- Mendez (Captain)
- Mendez (Lieutenant)
- Mendez (USS Enterprise-D)
- Mendez (Yeoman)
- Mendicum Stone
- Mendock
- Mendon
- Mendora Nebula
- Mendosa
- Mendoza
- Mendoza (President)
- Menebis
- Menelo
- Menen
- Meneri
- Menes (mirror)
- Meneth
- Menex
- Meng
- Meng (Klingon)
- Meng (Skurian)
- Meng (Vulcan)
- Mengel
- Mengen
- Mengenite
- Mengin's frigate
- Meni
- Menidex
- Menik
- Menith
- Menith II
- Menith III
- Menith Station
- Menitrom 799
- Menju nut
- Menk
- Menk (disambiguation)
- Menk system
- Menlo T. Hodgkiss Memorial Gymnasium
- Mennekaren Mountain Range
- Mennil Farran
- Menorah
- Menos
- Mensa
- Mensara
- Menta-pix
- Mentain the Strong
- Mental giant of Taos
- Mentalist
- Mentenius
- Menteshay th'Zaigrel
- Menthar-Promellian War
- Mentor
- Mentori
- Mentosh Assembly
- Mentrax
- Mentrax I
- Mentrax II
- Mentrax III
- Mentrax III-A
- Mentrax III-B
- Mentricat
- Menvek
- Menvel Swee
- Menzala Trivere
- Menzies 216
- Menzies 216 V
- Meow
- Meperidine
- Mephil Trantos
- Meprean grackle
- Mer
- Mera
- Mera Zine
- Merab Jis
- Meraht
- Merak
- Merak Entor
- Merak Fleet Yards
- Merak II
- Merak III
- Meraka Trel
- Merakan
- Merakan Commerce Board
- Merakord II
- Merakordi
- Meramar
- Merangue
- Merat Ocean
- Mercan
- Mercan (planet)
- Mercaniad
- Mercaptan
- Merced
- Merced class
- Mercedes Santiago
- Mercenam
- Mercenam IV
- Merchant's Guild
- Merchant Marine
- Merchant Marine Police
- Merchant class
- Merchant class (Vulcan)
- Merchantman
- Merchantman personnel
- Merciless
- Merculite warhead
- Mercurius Singletary
- Mercury
- Mercury (element)
- Mercury (planet)
- Mercury bourbon
- Mercury class (courier)
- Mercury class (escort)
- Mercury class (scout)
- Mercury class (warpshuttle)
- Mercy
- Mercy Hospital
- Merdan
- Merdosian
- Mere Anarchy
- Mere Mortals
- Meredith Cutler
- Meredith Peruzzi
- Mereez
- Merellion Sigma
- Meressa
- Meret class
- Merete AndrusTaurus
- Merfadon
- Mergele
- Merian
- Merian class
- Merian class (dreadnought)
- Mericor
- Mericor Anchorage
- Merid
- Meridian
- Meridian (Federation world)
- Meridian (Gamma Quadrant)
- Meridian (episode)
- Meridian housecat
- Meridian system
- Meridor
- Merik
- Merik (Klingon)
- Merik (disambiguation)
- Meringue (Mayor)
- Meris
- Merisa
- Merkaan
- Merken Vreenak
- Merkos Kerav
- Merlin
- Merlin (disambiguation)
- Merlino
- Mermaid's Revenge
- Mermaid egg
- Mernat
- Mernical III
- Meron Byxthar
- Merope
- Merope IV
- Merra
- Merrigold Press
- Merritt
- Merrok
- Merruthj
- Merry Men
- Mertak
- Mertens
- Mertens Orbital Research Station
- Meru
- Meru'th
- Meruun
- Meryl
- Mesanti
- Mesh Weaver class
- Meshav
- Meshk's cube
- Meshta gagh
- Meshu
- Mesit
- Mesk
- Meska
- Meskeen
- Meskeen captain
- Meskmaali