Kupjak
| Kupjak | |
|---|---|
| Village | |
| Country |
 Croatia |
| County | Primorje-Gorski Kotar County |
| Municipality | Ravna Gora |
| Time zone | CET (UTC+1) |
| • Summer (DST) | CEST (UTC+2) |
Kupjak is a village in Croatia. It is connected by the D3 highway.
Coordinates: 45°23′38″N 14°53′01″E / 45.3939127800°N 14.8835487100°E