Wyoming's 31st State Senate district is one of 31 districts in the Wyoming Senate. The district encompasses part of Laramie County. It is represented by Republican Senator Evie Brennan of Cheyenne.
During the 2020 redistricting cycle, the Wyoming Legislature passed a bill in 2022 solidifying the new legislative district boundaries in the state. These changed districts included adding a new seat, the 31st district, to the state senate, which previously had only 30 seats.