Cognomen Krupník (Krupník 
) , worldwide, is a very rare surname. The family name Krupník is habitual in Eastern Europe, particularly Czechia, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Krupník | Czechia |
| radim krupník Czech association football player (1973-), CZ (b. 1973) |
|