Forest Hills is an unincorporated community and census-designated place (CDP) in Kent County in the U.S. state of Michigan. The population was 28,573 at the 2020 census, making it the most populous CDP in Michigan. It is also the largest CDP by area in the state of Michigan, encompassing nearly all of Ada Township and most of the northern half of Cascade Township. The Forest Hills Public Schools District serves most of the community.

Ada Township is a civil township of Kent County in the U.S. state of Michigan. The population was 14,388 at the 2020 census.