Colorado's 31st Senate district
Colorado's 31st Senate district is one of 35 districts in the Colorado Senate. It has been represented by Democrat Matthew Ball since 2025, following the resignation of fellow Democrat Chris Hansen.
Geography
District 31 is based in the central and southeastern neighborhoods of Denver, including Capitol Hill; the district also includes the Arapahoe County exclaves of Glendale and Holly Hills.The district is located entirely within Colorado's 1st congressional district, and overlaps with the 2nd, 5th, 6th, 8th, and 9th districts of the Colorado House of Representatives. At 23 square miles, it is the smallest Senate district in the state.