Troy is a city in Oakland County in the U.S. state of Michigan. A northern suburb of Detroit, Troy is located about 22 miles (35 km) north of downtown Detroit. As of the 2020 census, the city had a population of 87,294, making Troy the largest community in Oakland County, and the 13th-most-populous municipality in the state. Troy was organized as a township in 1827, and sections of the township incorporated much later into the cities of Birmingham, Clawson, and Royal Oak. The remainder of the township incorporated as the present-day city of Troy in 1955. Troy has office centers and the Somerset Collection mall.