Morrison County is a county located in the U.S. state of Minnesota. As of 2000, the population was 31,712. Its county seat is Little Falls.
According to the U.S. Census Bureau, the county has a total area of 2,987 km² (1,153 mi²). 2,912 km² (1,124 mi²) of it is land and 75 km² (29 mi²) of it (2.50%) is water.