Richland County is a county in the U.S. state of Montana. As of the 2020 census, the population was 11,491. Its county seat is Sidney.
Richland County was created by the Montana Legislature in 1914 from part of Dawson County. An early proposed name for the county was Gate, but Richland was decided upon instead as a way to entice new settlers.
Geography
According to the United States Census Bureau, the county has a total area of , of which is land and (0.9%) is water.
Major highways
- 20px Montana Highway 16
- 20px Montana Highway 23
- 20px Montana Highway 200
Adjacent counties
- Roosevelt County – north
- Williams County, North Dakota – northeast
- McKenzie County, North Dakota – east
- Wibaux County - south
- Dawson County – southwest
- McCone County - west