Colorado's 12th Senate district is one of 35 districts in the Colorado Senate.

It has been represented by Republican Bob Gardner since 2017, succeeding fellow Republican Bill Cadman.

[3][4] District 12 is based in southern Colorado Springs in El Paso County, also covering the nearby communities of Cimarron Hills, Fort Carson, and parts of Security-Widefield, Falcon, and Stratmoor.

[5] The district is located entirely within Colorado's 5th congressional district, and overlaps with the 15th, 16th, 17th, 18th, 19th, 20th, and 21st districts of the Colorado House of Representatives.

[6] Colorado Senators are elected to staggered four-year terms; under normal circumstances, the 12th district holds elections in presidential years.