Unnamed humanoids (23rd century)
These are members of unidentified humanoid species observed in the 23rd century.

Aliens with leather headbands 

Ambassadors from this species served on the Federation Council in 2286. ()

Babel Conference attendees

Bounty hunter 

This female alien bounty hunter captured a Harcourt Fenton Mudd  in the sewers of a planet, only to misplace her ship. She was uninterested in Mudd's pleas of romantic interest, including the offer to show her the 27 moons of Tartus IV. 

She was at least a head shorter then Mudd, but claimed to be of normal height; she also observed that Mudd was "freakishly weak" compared to her. She occasionally let out an animalistic hiss when angry. She was antagonistic towards the Federation, and was interested in gaining leverage against it. ()

Earth bar visitors 
Port of San Francisco bar aliens

San Francisco bar aliens

Shipyard Bar aliens

Elysian councilor

Khitomer Conference attendees

Nimbus III inhabitants

Rura Penthe personnel

Starfleet personnel

Yorktown inhabitants 

fr:Humanoïdes inconnus (23ème siècle)
 Unnamed humanoids (23rd century)
Humanoids (23rd century)