Mizpah is a city in Koochiching County, Minnesota, United States. Its population was 58 at the 2020 census. U.S. Highway 71 and County …Mizpah is a city in Koochiching County, Minnesota, United States. Its population was 58 at the 2020 census. U.S. Highway 71 and County Road 36 are two of the main routes in Mizpah.