Bolshaya Selmenga () is a rural locality (a village) in Nyuksenskoye Rural Settlement, Nyuksensky District, Vologda Oblast, Russia. The population was 28 as of 2002. There are 2 streets.
Bolshaya Selmenga is located 35 km northeast of Nyuksenitsa (the district's administrative centre) by road. Krasavino is the nearest rural locality.