| Kolbeinsá | |
| Pushpin Map: | Iceland |
| Subdivision Type1: | Country |
| Subdivision Name1: | Iceland |
| Subdivision Type2: | Region |
| Subdivision Name2: | Westfjords |
| Length: | 10km |
Kolbeinsá (in Icelandic pronounced as /ˈkʰɔlˌpeinsˌauː/) is a farm and river about 10 km long in Westfjords, Iceland65.4333°N -34°W.