| Zastronie | |
| Settlement Type: | Village |
| Total Type: | |
| Coordinates: | 51.2992°N 20.8753°W |
| Pushpin Map: | Poland |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Masovian |
| Subdivision Type2: | County |
| Subdivision Name2: | Szydłowiec |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Szydłowiec |
| Population Total: | 260 |
Zastronie is a village in the administrative district of Gmina Szydłowiec, within Szydłowiec County, Masovian Voivodeship, in east-central Poland.[1]