Polk Township is one of 12 townships in Huntington County, Indiana, United States. As of the 2020 census, its population was 464.
Polk Township was organized in 1846. It was named for President James K. Polk.
According to the 2010 census, the township has a total area of , of which (or 94.40%) is land and (or 5.60%) is water.
The township contains one cemetery, Monument City Memorial.