Powell County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 7,027. Its county seat is Deer Lodge.GeographyAccording to the U.S. Census Bureau, the county has a total area of, of which is land and (0.3%) is water.Major highways20px Interstate 9020px U.S. Route 10 (Former)20px U.S. Route 1220px Montana Highway 14120px Montana Highway 200Adjacent counties Flathead County, Montana - north Lewis and Clark County, Montana - east Jefferson County, Montana - southeast Deer Lodge County, Montana - south Granite County, Montana - southwest Missoula County, Montana - west