Pease is a city in Mille Lacs County, Minnesota, United States. The population was 238 at the 2020 census. A post office called Pease w…Pease is a city in Mille Lacs County, Minnesota, United States. The population was 238 at the 2020 census. A post office called Pease was established in 1894, and remained in operation until 1994. Pease was named by railroad officials.