Osojnik may refer to:
- Iztok Osojnik, Slovene poet and essayist
- Osojnik, Dubrovnik-Neretva County, a village near Dubrovnik, Croatia
- Osojnik, Primorje-Gorski Kotar County, a village near Vrbovsko, Croatia
- Osojnik, Semič, a village in Lower Carniola, Slovenia
- Osojnik, Železniki, a village in Upper Carniola, Slovenia