Watertown Township, Sanilac County, Michigan

Watertown Township is a civil township of Sanilac County in the U.S. state of Michigan. The population was 1,263 at the 2020 census.

Communities

Cash is a historic locale in the southern part of the township at . It was named for Edward Cash, who in 1851 became the first white settler in the area. The first meeting to organize Watertown Township was held in his home in 1868. David Fowles built a sawmill in 1882. A post office operated from June 1883 until February 1905.
Sandusky is a city on the northern boundary of the township at the junction of M-19 and M-46, but is administratively autonomous. The Sandusky ZIP code 48471 serves most of the township except for parts in the southeast corner.
Watertown is an unincorporated community in the southern part of the township on M-19 at . The first school was built here in 1867. John Gimmel built a sawmill in 1882 and William Tomelson opened the first store in 1883. A post office operated from January 1895 until February 1905.
Carsonville is a village to the northeast and the Carsonville ZIP code 48419 serves an area in the eastern part of the township.
Peck is a village to the south and the Peck ZIP code 48466 serves a small area in the southern part of the township.

According to the United States Census Bureau, the township has a total area of 35.2 square miles (91.3 km), all land.

As of the census