Badger is an unincorporated community in the town of Lanark in Portage County, Wisconsin, United States.

Badger is approximately four miles northeast of the unincorporated community of Blaine, and borders Hartman Creek State Park.

Badger was the seat for the town of Lanark, including at one time bearing a post office around 1870–1901 with the same name.

Badger no longer has its own post office, but several bars remain in the area.

This article about a location in Portage County, Wisconsin is a stub.