Otter Creek Township is one of eleven townships in Jersey County, Illinois, United States.

As of the 2010 census, its population was 1,035 and it contained 422 housing units.

[2] According to the 2010 census, the township has a total area of 36.65 square miles (94.9 km2), of which 36.53 square miles (94.6 km2) (or 99.67%) is land and 0.11 square miles (0.28 km2) (or 0.30%) is water.

[2] The township contains these eleven cemeteries: Dabbs, Davenport, Dougherty, Edsall, Hamilton, Hinson, Lewis, McDowell, Noble Family, Salem and White.