| Stary Gromadzyn | |
| Settlement Type: | Village |
| Total Type: | |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Podlaskie |
| Subdivision Type2: | County |
| Subdivision Name2: | Kolno |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Gmina Kolno |
| Coordinates: | 53.4167°N 78°W |
| Pushpin Map: | Poland |
| Pushpin Label Position: | bottom |
| Population Total: | 251 |
Stary Gromadzyn is a village in the administrative district of Gmina Kolno, within Kolno County, Podlaskie Voivodeship, in north-eastern Poland.[1] It lies approximately 2km (01miles) north-east of Kolno and 880NaN0 west of the regional capital Białystok.