Stephen Miller (January 7, 1816 – August 18, 1881) was an American Republican politician. He was the first Civil War veteran to serve as Minnesota Governor. He was the fourth Governor of Minnesota.
Born in Carroll Township, Pennsylvania, Stephen Miller established a series of successful businesses. Frail health prompted the Pennsylvania Dutch entrepreneur to leave home at age 42 and follow his friend Alexander Ramsey to Minnesota, where the climate reportedly was more congenial. Miller established a mercantile business in St. Cloud and, within two years, had risen to prominence in the state Republican Party.
During the Civil War, this middle-aged soldier with no previous military experience advanced rapidly from the rank of private to colonel in Minnesota's First Regiment of Volunteers. In 1862 Miller returned from the South and replaced Brig. Gen. Henry Hastings Sibley as commander of Mankato's Camp Lincoln. There, 303 Dakota men, convicted of participating in the Dakota War of 1862, awaited their fate. Four months later, Miller supervised, by order of President Lincoln, the mass execution of 38 Dakotas condemned for their part in the war.