| Poniatowski | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Wisconsin |
| Pushpin Map Caption: | Location within the state of Wisconsin |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Marathon |
| Unit Pref: | Imperial |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Coordinates: | 44.9947°N -89.9942°W |
| Postal Code Type: | ZIP codes |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
Poniatowski is an unincorporated community, in the town of Rietbrock, Marathon County, Wisconsin, United States. The area is geographically notable for being less than one mile away from the 45°N, 90°W point. It's most likely named after a Polish royal family of the same name.
Poniatowski is also being considered one of few undiscovered Polish communities due to the group of Polish settlers established their village after Rietbrock in 1879, naming after Polish leader and general Józef Poniatowski.