Leoncin
| Leoncin | |
|---|---|
| Village | |
| Neogothic St. Margaret's Church | |
| Coordinates: 52°24′N 20°33′E / 52.400°N 20.550°E | |
| Country | Poland | 
| Voivodeship | Masovian | 
| County | Nowy Dwór | 
| Gmina | Leoncin | 
Leoncin pronounced [lɛˈɔnt͡ɕin] is a village in Nowy Dwór County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina (administrative district) called Gmina Leoncin.
Leoncin is approximately 40 kilometres (25 mi) north-west of Warsaw. It has a neogothic church from 1885, as well as a wooden chapel dating from the end of the 18th century that is located at a nearby cemetery. It is also famous for being the birthplace of Isaac Bashevis Singer.