Marie Steichen (died September 2006) was a Democratic politician from Woonsocket, South Dakota, who gained fame for winning a local election two months after dying of cancer. In the general election of November 7, 2006 she defeated, by a vote of 100 to 64,^[1] the incumbent Republican candidate Merlin Feistner for the post of commissioner of Jerauld County in the U.S. state of South Dakota.^[2][3]

This was the first time she had stood for election for political office. She and her husband Harold lived on a farm south of Lane, South Dakota. In the primary election, she had defeated Rick Easton of Wessington Springs by just one vote, 22–21.^[4]