Sunfish Lake is a city in Dakota County, Minnesota, United States. The population was 521 at the 2010 census. First incorporated as a village in 1958, the city's goal has been to maintain a rural atmosphere, with large lot size and as little disturbance of the natural environment as possible.

Dakota County is the third-most populous county in the U.S. state of Minnesota, located in the east central portion of the state. As of the 2020 census, the population was 439,882. The population of Dakota County was estimated to be 447,440 in 2023. The county seat is Hastings. Dakota County is named for the Dakota Sioux tribal bands who inhabited the area.