Poy Sippi is a town in Waushara County, Wisconsin, United States. The population was 972 at the 2000 census. According to the Poy Sippi Public Library website The Pine River was called "Poygan Sippi" by Potawatomie Indians, because it flowed into Poygan Lake. The name was contracted to Poy Sippi. It is said to be a corruption of an Indian word meaning "Sioux river. " [Source: The Romance of Wisconsin Place Names. ] Poy Sippi has often been described as a "little Swiss village" because of its location between two high hills. During any season, one cannot help but be aware of the beauty of these tree-covered hills when driving into Poy Sippi from either a north or south direction.