| Ostrowik | |
| Settlement Type: | Village |
| Total Type: | |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Podlaskie |
| Subdivision Type2: | County |
| Subdivision Name2: | Grajewo |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Radziłów |
| Pushpin Map: | Poland |
| Coordinates: | 53.4167°N 51°W |
Ostrowik is a village in the administrative district of Gmina Radziłów, within Grajewo County, Podlaskie Voivodeship, in north-eastern Poland.[1] It lies approximately 5km (03miles) east of Radziłów, 260NaN0 south of Grajewo, and 570NaN0 north-west of the regional capital Białystok.