| Kostrogaj | |
| Settlement Type: | Village |
| Total Type: | |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Masovian |
| Subdivision Type2: | County |
| Subdivision Name2: | Płock |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Radzanowo |
| Pushpin Map: | Poland |
| Coordinates: | 52.5667°N 64°W |
Kostrogaj is a village in the administrative district of Gmina Radzanowo, within Płock County, Masovian Voivodeship, in east-central Poland.[1] It lies approximately 11km (07miles) west of Radzanowo, 40NaN0 north-east of Płock, and 940NaN0 north-west of Warsaw.