Ashippun is a town in Dodge County, Wisconsin, United States. 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.