| Rząśnik | |
| 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: | Stary Lubotyń |
| Coordinates: | 52.9431°N 21.99°W |
| Pushpin Map: | Poland |
| Population Total: | 264 |
Rząśnik (pronounced as /pl/) is a village in the administrative district of Gmina Stary Lubotyń, within Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland.[1]
During World War II, in summer 1941, about 2,600 Jews from nearby villages are murdered in mass executions perpetrated by an Einsatzgruppen.[2]