Cognomen Krocko (Krocko 
) , globally, is a very rare last name. The surname Krocko is characteristic of Slovakia, where it is a rare surname, Czechia, and Canada, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Slovakia, Czechia, and the United States. Very seldom, Krocko is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Krocko | Canada, United States, Czechia, Slovakia |