| Name | Ostrów Mazowiecka |
| Office head of government | |
| Mayor | |
| Image |  |
| Area (m²) | 22,090,000 |
| Date founded | After 1434 |
| Elevation (m) | 110 |
| Country | Poland |
| Administrative division | Masovian |
| Continent | Europe |
| Latitude (°) | 52.7999992371 |
| Waterbody | |
| Longitude (°) | 21.8999996185 |
| Website | http://www.ostrowmaz.pl |
| Population (people) | 23,486 (2006) |
| Demonym |