| Kupnina | |
| Settlement Type: | Village |
| Total Type: | |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Podlaskie |
| Subdivision Type2: | County |
| Subdivision Name2: | Łomża |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Nowogród |
| Pushpin Map: | Poland |
| Coordinates: | 53.2833°N 78°W |
Kupnina is a village in the administrative district of Gmina Nowogród, within Łomża County, Podlaskie Voivodeship, in north-eastern Poland.[1] It lies approximately 8km (05miles) north-east of Nowogród, 160NaN0 north-west of Łomża, and 840NaN0 west of the regional capital Białystok.