Surname Кошмаков (Кошмаков 
) , in the world, is a very rare family name. The last name Кошмаков is habitual in Kyrgyzstan, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Ukraine, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in Kyrgyzstan, Russia, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Кошмаков | Russia, Kyrgyzstan, Kazakhstan, Ukraine |