Macomb County /

Macomb County is a county in the U.S. state of Michigan. The 2010 census recorded its population to be 840,978, making it the third most populous county in the state. Of Michigan's five largest counties, Macomb experienced the most population growth (6.7%) between 2000 and 2010. The county seat is Mt. Clemens. Macomb County is part of the Detroit metropolitan area; the city of Detroit is located south of 8 Mile Road, the county's southern border. Macomb County contains 28 cities, townships and villages, including three of the top ten most populous municipalities in Michigan as of the 2010 census: Warren (#3), Sterling Heights (#4) and Clinton Township (#10). The communities range from mature, inner-ring suburbs like the cities of Warren and Roseville to newer, wealthier locales such as Sterling Heights, Macomb Township, Shelby Township, Clinton Township and Washington Township. The county is named for Alexander Macomb, Jr., an early U.S. Army commander. According to the 2000 census, the county has a total area of 569.78 square miles (1,475.7 km), of which 480.44 square miles (1,244.3 km) (or 84.32%) is land and 89.34 square miles (231.4 km) (or 15.68%) is water. Lake St. Clair