Last name Сопчак (Сопчак 
) , across the world, is a very rare family name. The surname Сопчак is habitual in Belarus, where it is a rare surname, Ukraine, where it is a very rare surname, and Kazakhstan. Not in comparison with a country's population, it is the most numerous in Eastern Europe, particularly Ukraine, Belarus, and Russia.
| VARIANT | COUNTRY |
|---|---|
| Сопчак | Russia, Kazakhstan, Ukraine, Belarus |