Osa () is the name of several inhabited localities in Russia.
Urban localities Osa, Perm Krai, a town of district significance in Osinsky District of Perm Krai
Rural localities Osa, Irkutsk Oblast, a selo in Osinsky District of Irkutsk Oblast Osa, Kirov Oblast, a village in Makaryevsky Rural Okrug of Kotelnichsky District of Kirov Oblast