The Mill Creek township of Hamilton County, Ohio was located in the south-central part of the county. It extended north from the Ohio River along both banks of the Mill Creek after which it was named. As the original site of Fort Washington and the settlement of Cincinnati, references to it are frequently encountered by genealogists.

Urbanization has been such that the township has been entirely incorporated into the cities of Cincinnati, St. Bernard, and Elmwood Place. It remains only as a survey township, since all functions of local government have been absorbed by the nearby municipalities.