Cosmonaut (disambiguation)

A cosmonaut or astronaut is a person trained by a human spaceflight program to command, pilot, or serve as a crew member of a spacecraft.

Cosmonaut may also refer to:
 * Cosmonaut (film), a 2009 Italian coming-of-age film
 * The Cosmonaut, a 2013 Spanish science fiction film
 * Cosmonauts Sea, a sea of the Southern Ocean off Antarctica
 * Cosmonaut Glacier, a tributary glacier in the Southern Cross Mountains, Antarctica
 * Cosmonaut (album), by Bump of Chicken
 * Cosmonaut, a side project of the band Finch