Wisconsin's 31st Senate district

The 31st Senate District of Wisconsin is one of 33 districts in the Wisconsin Senate. Located in western Wisconsin, the district comprises all of Eau Claire County, southeast Dunn County, and parts of southern Chippewa County and northern Trempealeau County. It includes the cities of Eau Claire, Chippewa Falls, and Menomonie.

Current elected officials
Jeff Smith is the senator representing the 31st district. He was first elected in 2018 general election. He previously served in the Wisconsin State Assembly from 2007 through 2011.

Each Wisconsin State Senate district is composed of three Wisconsin State Assembly districts. The 31st Senate district comprises the 91st, 92nd, and 93rd Assembly districts. The current representatives of those districts are:
 * Assembly District 91: Jodi Emerson (D–Eau Claire)
 * Assembly District 92: Treig Pronschinske (R–Mondovi)
 * Assembly District 93: Warren Petryk (R–Washington)

The district is located almost entirely within Wisconsin's 3rd congressional district, which is represented by U.S. Representative Derrick Van Orden. The exception is one area of Chippewa County which falls within Wisconsin's 7th congressional district, represented by Tom Tiffany.

Past senators
Previous senators include:

Note: the boundaries of districts have changed repeatedly over history. Previous politicians of a specific numbered district have represented a completely different geographic area, due to redistricting.