Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Todd County is a county located in the U.S. state of Minnesota. As of 2000, the population was 24,426. Its county seat is Long Prairie. The county is named after John Blair Smith Todd (D) (April 4, 1814 January 5, 1872) who was a delegate from Dakota Territory to the United States House of Representatives and a general in the Union Army during the American Civil War. He was a cousin of Mary Todd Lincoln.