| Prostyń | |
| Settlement Type: | Village |
| Total Type: | |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Masovian |
| Subdivision Type2: | County |
| Subdivision Name2: | Ostrów Mazowiecka |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Małkinia Górna |
| Coordinates: | 52.6667°N 80°W |
| Pushpin Map: | Poland |
| Pushpin Label Position: | bottom |
| Population Total: | 840 |
Prostyń is a village in the administrative district of Gmina Małkinia Górna, within Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland.
