Ervin Township is one of eleven townships in Howard County, Indiana, United States. As of the 2020 census, its population was 2,143, down from 2,227 in 2010.
Ervin township was named for Robert Ervin, a county judge.
In the mid-1800s, the township was home to two African American settlements, the Rush Settlement and the Bassett Settlement. The Bassett settlement was the home of Richard Bassett, a Baptist minister who later became the third African-American state representative in Indiana history, and the first from Howard County.
According to the 2010 census, the township has a total area of , all land. The stream of Petes Run runs through this township.
(This list is based on USGS data and may include former settlements.)
The township contains ten cemeteries: Barnett, Brown, Kappa, Mound, North Union, Petes Run, Pickett, Price, Rush and South Union.