Yefimovsky (; masculine), Yefimovskaya (; feminine), or Yefimovskoye (; neuter) is the name of several inhabited localities in Russia.
Urban localities Yefimovsky (urban-type settlement), an urban-type settlement in Yefimovskoye Settlement Municipal Formation of Boksitogorsky District, Leningrad Oblast
Rural localities Yefimovskoye, Kostroma Oblast, a village in Sudayskoye Settlement of Chukhlomsky District of Kostroma Oblast Yefimovskoye, Yaroslavl Oblast, a village in Novinkovsky Rural Okrug of Pervomaysky District of Yaroslavl Oblast Yefimovskaya, Arkhangelsk Oblast, a village in Berezonavolotsky Selsoviet of Krasnoborsky District of Arkhangelsk Oblast Yefimovskaya, Sverdlovsk Oblast, a village in Taborinsky District of Sverdlovsk Oblast Yefimovskaya, Vladimir Oblast, a village in Sudogodsky District of Vladimir Oblast Yefimovskaya, Tarnogsky District, Vologda Oblast, a village in Verkhnekokshengsky Selsoviet of Tarnogsky District of Vologda Oblast Yefimovskaya, Vozhegodsky District, Vologda Oblast, a village in Vozhegodsky Selsoviet of Vozhegodsky District of Vologda Oblast