The 30th Senate District of Wisconsin is one of 33 districts in the Wisconsin Senate. Located in northeast Wisconsin, the district comprises part of central Brown County. It includes most of the city of Green Bay, along with the city of De Pere and the villages of Allouez, Ashwaubenon, and Bellevue.

The Wisconsin Senate is the upper house of the Wisconsin State Legislature. Together with the larger Wisconsin State Assembly they constitute the legislative branch of the state of Wisconsin. The powers of the Wisconsin Senate are modeled after those of the U.S. Senate.