Family name Копац (Kopacz 
, Kopac 
, Копац 
) , in the entire world, is quite a common last name. The cognomen Копац is habitual in Slovenia, where it is quite a common surname, Poland, and Slovakia, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in Poland, the United States, and Slovenia. Also, Копац is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kopacz | Germany, France, Romania, United States, Poland |
| Kopac | Czechia, France, Slovakia, Slovenia, United States |
| Копац | Russia |
| копац євген іванович UA (b. 1889) |
|