| Grodnia | |
| Settlement Type: | Village |
| Total Type: | |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Masovian |
| Subdivision Type2: | County |
| Subdivision Name2: | Sierpc |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Mochowo |
| Coordinates: | 52.7039°N 19.5289°W |
| Pushpin Map: | Poland |
| Pushpin Label Position: | bottom |
Grodnia is a village in the administrative district of Gmina Mochowo, within Sierpc County, Masovian Voivodeship, in east-central Poland.[1] It lies approximately 22km (14miles) south-west of Sierpc and 1140NaN0 north-west of Warsaw.