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is a city in Macomb County in the U.S. state of Michigan. As of the 2000 census, the city had a total population of 138,247, making Warren the largest city in Macomb County, the third most populous city in Michigan, and Metro Detroit's largest suburb.
The city is home to a wide variety of businesses, including General Motors Technical Center, the United States Army Detroit Arsenal, home of the Tank-Automotive and Armaments Command (TACOM) and the Tank Automotive Research, Development and Engineering Center (TARDEC), they are now creating larger facilities, the National Automotive Center (NAC), and the headquarters of Big Boy Restaurants International, Campbell Ewald, and Asset Acceptance. The current mayor is James R. Fouts, who was elected to his first mayoral term in November 2007.
In 1950 Warren was an incorporated village of one square mile within the boundaries of Warren Township, Macomb County, Michigan. It was centered on the corner of Mound Road and Chicago Road. The village had a population of 582 in 1940 and 727 in 1950.
Warren was incorporated as a city in 1957 and consists of what was previously Warren Township, less the city of Center Line, which is encircled by Warren. Between 1950 and 1960, Warren's population soared from 42,653 to 89,426. This population explosion was fueled in part by white flight from its southern neighbor of Detroit in that decade. This change in population continued into the next decade when the city's population doubled again. As the community has matured, its population has begun to gradually decline.