Berlin Township is a township located in St. Clair County in the U.S. state of Michigan. As of the 2000 census, the township had a total population of 3,162.
According to the United States Census Bureau, the township has a total area of 96.2 km2 (37.1 mi2). 96.2 km2 (37.1 mi2) of it is land and none of it is covered by water.