| Kocielnik | |
| Settlement Type: | Village |
| Total Type: | |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Masovian |
| Subdivision Type2: | County |
| Subdivision Name2: | Węgrów |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Sadowne |
| Coordinates: | 52.6564°N 21.905°W |
| Pushpin Map: | Poland |
| Pushpin Label Position: | bottom |
| Population Total: | 210 |
Kocielnik is a village in the administrative district of Gmina Sadowne, within Węgrów County, Masovian Voivodeship, in east-central Poland.[1] It lies approximately 4km (02miles) east of Sadowne, 300NaN0 north of Węgrów, and 790NaN0 north-east of Warsaw.