Royal Oak Charter Township is a charter township in Oakland County in the U.S. state of Michigan. As of the 2020 census, the population was 2,374. The city of Royal Oak is slightly to the north and is administered autonomously. The township is the only remaining unincorporated portion of the original 36-square-mile (93.2 km2) Royal Oak survey township, which was organized in 1833. With a present-day area of 0.55 square miles (1.42 km2), Royal Oak Charter Township is the state's smallest charter township by area and the second-smallest overall township in the state after Novi Township.