Regular cast characters by rank
This page is a list of characters played by the regular cast from the Star Trek series and films.

By first appearance 
Characters listed by rank or title, at first appearance (or earliest known appearance holding a rank or title)

Civilians
 Wesley Crusher
 Quark
 Jake Sisko
 Neelix
 Kes
 Seven of Nine
 Phlox

Starfleet 
Captain
 James T. Kirk
 Jean-Luc Picard
 Kathryn Janeway
 Jonathan Archer
 
 Christopher Pike
 Carol Freeman
Commander
 Spock
 William T. Riker

 Chakotay (provisional)
 Beverly Crusher
 Katherine Pulaski
 Benjamin Sisko
 Charles Tucker III
 Michael Burnham
 Jack Ransom
 T'Ana
Lieutenant commander
 Leonard McCoy
 Montgomery Scott
 Data
 Deanna Troi
 Saru
 Hugh Culber
Lieutenant
 Uhura
 Hikaru Sulu
 Natasha Yar
 Jadzia Dax
 Tuvok

 Malcolm Reed
 Paul Stamets
 Shaxs
Lieutenant junior grade
 Geordi La Forge
 Worf
 Julian Bashir
 Tom Paris

 B'Elanna Torres (provisional)
 Bradward Boimler
Ensign
 Pavel Chekov
 Ezri Dax
 Harry Kim
 Travis Mayweather
 Hoshi Sato*
 Christine Chapel
 Beckett Mariner
 Samanthan Rutherford
 D'Vana Tendi
Chief petty officer
 Miles O'Brien
Non-commissioned officer
 The Doctor

Bajoran Militia 
Major
 Kira Nerys
Non-commissioned officer
 Odo

Vulcan High Command 
Sub-Commander
 T'Pol

By latest appearance or highest rank

Starfleet 
Admiral
 Jonathan Archer *
 Leonard McCoy *
 Jean-Luc Picard *
Vice admiral
 Kathryn Janeway
Rear admiral
 James T. Kirk (later demoted to captain)
Captain
 
 Spock
 Montgomery Scott
 Hikaru Sulu
 Data (acting captain during "Gambit")
 William T. Riker
 Benjamin Sisko
 Christopher Pike (styled "fleet captain")
 Carol Freeman
 Saru
Commander
 Michael Burnham (stripped of rank, later re-instated)
 Charles Tucker III
 T'Pol
 Uhura
 Pavel Chekov
 Beverly Crusher
 Deanna Troi
 Kira Nerys
 Chakotay (provisional)
 Jack Ransom
 T'Ana
Lieutenant Commander
 Hugh Culber
 Paul Stamets
 Hoshi Sato
 Janice Rand
 Christine Chapel
 Data
 Geordi La Forge
 Tuvok
 Worf
 Jadzia Dax (position of captain of the Defiant; however, still rank of Lt. Cmdr. as explained in "Behind the Lines")
Lieutenant
 Malcolm Reed
 Natasha Yar
 Julian Bashir
 Shaxs
 Beckett Mariner (promoted, then later demoted back to ensign in "Moist Vessel")
Lieutenant junior grade
 B'Elanna Torres (provisional)
 Tom Paris (demoted to ensign, later promoted back to lieutenant junior grade)
 Ezri Dax
 Wesley Crusher
 Bradward Boimler
Ensign
 Wesley Crusher
 Granted acting officer commission by Picard.
 Travis Mayweather
 Harry Kim
 Samanthan Rutherford
 D'Vana Tendi
SCPO
 Miles O'Brien* = grade unknown Bajoran 
Colonel
 Kira Nerys
Non-commissioned officer
 Odo

 Klingon 
Chancellor
 Worf

 In alternate realities 
Civilians
 Quark/ Jake Sisko
 Kes
 Seven of Nine

 Phlox/ Starfleet 
Admiral
 Jonathan Archer *
 Leonard McCoy *
 William T. Riker ()
Vice Admiral
 Kathryn Janeway
Rear Admiral
 James T. Kirk
Captain
  ()

 T'Pol ()
 Charles Tucker III ("Twilight")
 Malcolm Reed ("Twilight")
 
  ()
 Spock
 Montgomery Scott
 Hikaru Sulu
 Jean-Luc Picard

 Benjamin Sisko
 Chakotay ()
 Geordi La Forge ()
 Beverly Crusher ("All Good Things...")
 Harry Kim ()
Commander
  ("Mirror, Mirror")
 Uhura
 Pavel Chekov
 Deanna Troi
 Kira Nerys
 Tuvok ("Before and After")
 Worf ()
 Jadzia Dax ()
 Julian Bashir ("The Visitor")
Lieutenant Commander
  ("In a Mirror, Darkly, Part II)
 Hoshi Sato
  ("Mirror, Mirror")
  ("Mirror, Mirror")
 Janice Rand
 Data
 Tom Paris ("Before and After")
Lieutenant
 Wesley Crusher ("Parallels")
  ("In a Mirror, Darkly, Part II"; possibly made empress)
  ("Mirror, Mirror)
 Natasha Yar
 B'Elanna Torres *
 Ezri Dax*
Ensign
 Travis Mayweather  ("Mirror, Mirror")
 Neelix ()
SCPO
 Miles O'Brien* = grade unknown Klingon/Cardassian Alliance 
Regent
 
Intendant
 
Non-commissioned officer
Odo

 MACO 
Major
 Sergeant
  ("In a Mirror, Darkly, Part II")

 Terran Rebellion 
CaptainMember''
Production lists