Euso

EUSO or Euso may refer to:


 * EUSO mission, a mission of the European Space Agency
 * EUSO, European Union Science Olympiad, a team-based youth science competition, renamed to European Olympiad of Experimental Science (EOES) in 2021
 * Euso (spider), a genus of spiders in the family Ochyroceratidae
 * Euso, an old Gascon name for the French town of Eauze