Wilmington Township is one of fifteen townships in DeKalb County, Indiana.

As of the 2020 census, its population was 3,995 (down from 4,128 at the 2010 census[4]) and it contained 1,600 housing units.

Wilmington Township was organized in 1837.

[5][6] According to the 2010 census, the township has a total area of 35.98 square miles (93.2 km2), of which 35.97 square miles (93.2 km2) (or 99.97%) is land and 0.01 square miles (0.026 km2) (or 0.03%) is water.

[4] The township contains two cemeteries: Kraft and Krontz.