Stevens County is a county in the U.S. state of Minnesota. As of the 2020 census, the population was 9,671. Its county seat is Morris. The county was created by act of the Minnesota legislature on February 20, 1862. It was not organized at that time, and no county seat was named. The county was named for Isaac Stevens, who had led a railroad survey …Stevens County is a county in the U.S. state of Minnesota. As of the 2020 census, the population was 9,671. Its county seat is Morris. The county was created by act of the Minnesota legislature on February 20, 1862. It was not organized at that time, and no county seat was named. The county was named for Isaac Stevens, who had led a railroad survey party across Minnesota in 1853 and was influential in bringing national attention to the Minnesota Territory. The territorial legislature had intended to thus honor Stevens in 1855 when another county was being created, but a clerical error caused that county to be named Stearns. The error was corrected by the 1862 act; by that time Stevens was a brigadier general for the Union Army in the American Civil War. Stevens was killed later that year. The county government was organized in 1872. Morris, which had been platted in 1869, was named the county seat.