It includes the cities of Eau Claire, Chippewa Falls, and Menomonie.

[2] Jeff Smith is the senator representing the 31st district.

The exception is one area of Chippewa County which falls within Wisconsin's 7th congressional district, represented by Tom Tiffany.

[5] Previous senators include:[6] 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.