Troy is a city located in Metropolitan Detroit's northern suburbs in Oakland County in the U.S. state of Michigan. The population was 80,980 at the 2010 census, making it the 11th-largest city in Michigan by population, and the largest city in Oakland County. Troy has become a business and shopping destination in the Metro Detroit area, with numerous office centers and the upscale Somerset Collection mall.In 2011, Troy was ranked the safest city in Michigan, as well as the 19th safest city in the nation. In 2008, Troy was ranked 22nd on a list of "Best Places to Live" in the United States by CNN Money, using criteria including housing, quality of education, economic strength, and recreational opportunities. In 2008, Troy ranked as the fourth most affordable U.S. city with a median household income of approximately $79,000.