Domna (; , Domno) is a rural locality (a selo) in Yeravninsky District, Republic of Buryatia, Russia. The population was 160 as of 2010. There are 11 streets.
Domna is located 13 km northeast of Sosnovo-Ozerskoye (the district's administrative centre) by road. Sosnovo-Ozerskoye is the nearest rural locality.