Surname Kosmakova (Kosmakova 
, Космакова 
) , throughout the world, is a rare family name. The cognomen Kosmakova is habitual in Lithuania, where it is quite a rare surname, Russia, where it is a rare surname, and Czechia. Not in comparison with a country's population, it is the most numerous in Eastern Europe, particularly Russia, Czechia, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Kosmakova | Czechia, Russia, Estonia, Lithuania |
| Космакова | Belarus, Kazakhstan, Russia, Ukraine |