Patzau is an unincorporated community, in Douglas County, in the town of Summit, in the northwestern part of the U.S. state of Wisconsin.

County Road BB serves as a main route in the community.

The community was named after Pacov (then Patzau) in what is now the Czech Republic, by a cattle dealer from the town.

Soo Line operated a yard there in the early to mid 1900s.

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