Macomb County, Michigan

Macomb County, Michigan
Charter County
Macomb County Administration Building in Mt. Clemens
Seal
Location within the U.S. state of Michigan
Coordinates: 42°40′N 82°55′W
Country	United States
State	Michigan
Founded	January 15, 1818
Named for	Alexander Macomb
Seat	Mount Clemens
Largest city	Warren
Area
• Total	571 sq mi (1,480 km2)
• Land	479 sq mi (1,240 km2)
• Water	92 sq mi (240 km2)  16%
Population  (2020)
• Total	881,217
• Estimate  (2025)	886,221
• Density	1,840/sq mi (710/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional districts	9th, 10th
Website	macombgov.org

Macomb County (/məˈkoʊm/ mə-KOHM) is a county on the eastern shore of the U.S. state of Michigan. It is part of the Detroit metropolitan area, bordering Detroit to the south and containing many of its northern suburbs. Its county seat is Mt. Clemens, and its largest community is Warren. As of the 2020 census, the county had a population of 881,217, making it the third-most populous county in the state, behind neighboring Wayne and Oakland. Macomb County contains 27 cities, townships and villages, including three of the ten most-populous municipalities in Michigan. Most of this population is concentrated south of Hall Road (M-59), one of the county's main thoroughfares.