As of the 2006 census, Warren had an estimated population of 134,589, making it the third most populous city in Michigan and metropolitan Detroit's largest suburb. Warren was incorporated as a city in 1957 and consists of what was previously Warren Township, less the city of Center Line. 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.
Warren has a diverse ethnic community, with the majority being Polish-, German-, and Iraqi-American. This population explosion continued into the next decade when the city's population doubled again. The overall population of the city has risen in the last 15 years, due in part to the number of Iraq-American citizens immigrating to the United States because of conflicts in their home country.
Warren is the home of the United States Army Tank-Automotive and Armaments Command (TACOM), the Tank Automotive Research, Development and Engineering Center (TARDEC), the National Automotive Center (NAC), and the headquarters of Big Boy Restaurants International and Asset Acceptance.
The city's recreation department supports a community center and a recreation center along with a system of 24 parks. The Warren Symphony Orchestra gives several concerts per season. In 2003, the city built a brand new Community Center on the site of the old Warren High School. It has an auditorium, several gyms and conference rooms. A number of organizations can be found within the city of Warren, offering a variety of enrichment experiences. These include the Warren Fine Arts Center, Polonaise Strings and Musica Polonica, Warren Community Chorus, Warren Concert Band, the Vivace Music Club, and the Macomb Center for the Performing Arts. Warren is also a progressive community that offers residents and non-residents access to a dog park. The Warren Animal Welfare Commission sponsors low cost pet vaccinations for dogs and cats two times per year.