| Jarnostaw | |
| Settlement Type: | Village |
| Total Type: | |
| Subdivision Type: | Country |
| Subdivision Type1: | Voivodeship |
| Subdivision Name1: | Greater Poland |
| Subdivision Type2: | County |
| Subdivision Name2: | Ostrów Wielkopolski |
| Subdivision Type3: | Gmina |
| Subdivision Name3: | Sośnie |
| Coordinates: | 51.4736°N 17.5586°W |
| Pushpin Map: | Poland |
| Pushpin Label Position: | right |
Jarnostaw is a village in the administrative district of Gmina Sośnie, within Ostrów Wielkopolski County, Greater Poland Voivodeship, in west-central Poland.[1] It lies approximately 5km (03miles) west of Sośnie, 220NaN0 south-west of Ostrów Wielkopolski, and 1120NaN0 south-east of the regional capital Poznań.