Trooper may refer to:
In military or police forces:
- Trooper (rank), a military private rank
- Trooper (police rank), a rank used by some police agencies
- State trooper, a peace officer in U.S. state police, game warden, or rangers
- Airtrooper, a military private rank of the British Army Air Corps
- Stormtrooper (disambiguation)
- Troopers Drum and Bugle Corps, of Casper, Wyoming
- Troopship
- Cavalry horse; see horses in warfare
- "The Trooper", the regimental statue of the Rhodesian Light Infantry
In entertainment:
- Trooper (band), a Canadian rock band
- Trooper (Romanian band), a Romanian heavy metal band
- "The Trooper", a song by Iron Maiden
- Starship Troopers, a 1959 Heinlein book, and series of adapted movies, animations, and games
- Super Troopers, a 2001 comedy film
- A synonym for an ushanka, a Russian fur hat
Other uses:
- Trooper, Pennsylvania, an unincorporated community
- Colt Trooper, a revolver
- Isuzu Trooper an SUV
Trooper should not be confused with:
- Trouper, a member of a troupe