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.
- Joseph Chesak, Wisconsin state legislator and businessman, owned a store in Poniatowski.
- ^ U.S. Geological Survey Geographic Names Information System: Poniatowski, Wisconsin
- ^ 'Wisconsin Blue Book 1889,' Biographical Sketch of Joseph Chesak, pg. 512