Harrison Township is one of 11 townships in Howard County, Indiana, United States.

As of the 2020 census, its population was 9,848, upfrom 9,489 in 2010.

[1] According to the 2010 census, the township has a total area of 21.77 square miles (56.4 km2), of which 21.68 square miles (56.2 km2) (or 99.59%) is land and 0.09 square miles (0.23 km2) (or 0.41%) is water.

[1] Harrison Township was also one of the only townships in Howard County to grow from 2000 to 2010.

The township contains two cemeteries: Sunset Memory Gardens and Twin Spring.