Heath Township is a civil township of Allegan County in the U.S. state of Michigan. As of the 2020 census, the township population was 3,937.
Communities
Dunningville is a historic locale in the southern part of the township at . Andrew Whistler built a sawmill here in 1855 that was operated by persons named Dunning and Hopkins. A station on the Chicago and West Michigan Railroad (later part of the Pere Marquette Railway) was named "Dunning", but the post office used the name Dunningville.
Hamilton is an unincorporated community in the northwest corner of the township, where M-40 crosses the Rabbit River at . The first white settler was Charles Butler, who purchased the entirety of section 6 in 1835. It was at first known as Rabbit River, with a post office operating from May 1851 to September 1852. Aaron Willards platted a village named Rabbit River in 1862, with a second post office opening in July 1864. The post office was renamed "Hamilton" in May 1870. The ZIP code is 49419 and serves much of the township and surrounding areas.