Ashippun is a town in Dodge County, Wisconsin, United States. The census-designated place of Ashippun and unincorporated community of Alderley are located in the town. The population was 2,308 at the 2000 census. Ashippun is perhaps named for the Indian word for raccoon which is what the Indians called the river flowing through the eastern part of the town.
The primary community area is actually split into two parts, Ashippun and Old Ashippun. Old Ashippun was the original location, but when the first railroad was built several miles away, a large portion of the community relocated, as occurred with nearby Lebanon.
According to the United States Census Bureau, the town has a total area of 35.7 square miles (92.5 km²), of which, 35.6 square miles (92.3 km²) of it is land and 0.1 square miles (0.2 km²) of it (0.25%) is water.