Crookston is a city in the U.S. state of Minnesota. It is the county seat of Polk County. The population was 7,482 at the 2020 census. It is part of the "Grand Forks, ND-MN Metropolitan Statistical Area" or "Greater Grand Forks". Crookston is the episcopal seat of the Roman Catholic Diocese of Crookston. Crookston is partially a commuter town to the larger city of Grand Forks, North Dakota.