Poy Sippi is a town in Waushara County, Wisconsin, United States.

The census-designated place of Poy Sippi is located in the town.

The unincorporated communities of Borth and Fountain Valley are also located in the town.

"[4] In the related Menominee language, it is called Pawāhnān-Sīpiah, "Wild Rice Gathering River", referring to the importance of wild rice as a staple crop to the local people.

23.2% of all households were made up of individuals, and 11.0% had someone living alone who was 65 years of age or older.