Losna may refer to:
Places Losna (island), an island in Solund municipality in Vestland county, Norway Losna (lake), a lake in the municipalities of Ringebu and Øyer in Innlandet county, Norway Loşna River, a headwater of the Negoiu river in Romania Losna, Russia, a village in Smolensk, Russia
Other Losna (mythology), the Etruscan moon goddess
See also Losne, a commune in the Côte-d'Or department in eastern France