Troy is a city in Oakland County in the U.S. state of Michigan. It is a suburb of Detroit. The population was 80,959 at the 2000 census, making it the 12th-largest city in Michigan by population, and the second-largest city in Oakland County after Farmington Hills. Troy has become a business and shopping destination in the Metro Detroit area, with numerous office centers and the upscale Somerset Collection mall. Troy was recently ranked the 5th safest city in the nation, as well as the safest in Michigan. 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 $90,000.