Starfleet cadets
In Starfleet, cadets were new recruits that enrolled in Starfleet Academy, who, upon graduation, were promoted to the rank of ensign and became an officer.

23rd century

2250s
 Finnegan
 James T. Kirk (graduated at the rank of lieutenant)
 R.M. Merik
 Gary Mitchell
 Nyota Uhura

2260s
 Muliq Al Alcazar
 T'Quiel Dawn
 Irina Galliulin
 Yuuto Hoshide
 Andrea Lopez
 Dusty Swender

2280s
 
 Peter Preston
 Valeris (first Vulcan to graduate top of her class)
 Unnamed cadet played by Nicholas Guest

24th century

2320s
 Jean-Luc Picard (first freshman to win the Academy marathon)

2350s
 William T. Riker (eighth in his class)
 Worf (first Klingon in Starfleet)

2360s
 Joshua Albert
 Wesley Crusher
 Jean Hajar
 Nicholas Locarno (expelled following the death of Joshua Albert)
 Adam Martoni
 Mordock (first Benzite in Starfleet)
 Sito Jaxa

2370s
 Dorian Collins
 Wesley Crusher
 James Mooney MacAllister
 Nog (first Ferengi in Starfleet)
 Riley Aldrin Shepard
 Karen Farris
 Tim Watters

Apocrypha
 Matt D. Decker, and the rest of Omega Squadron, from Marvel's  series Star Trek: Starfleet Academy.
 Various cadets from the Star Trek: Titan novels.

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sv:Stjärnflottans kadetter