Otter Creek Township is one of twelve townships in Vigo County, Indiana, United States.

As of the 2010 census, its population was 9,069 and it contained 3,917 housing units.

[2] Markle House and Mill Site was listed on the National Register of Historic Places in 1979.

[3] According to the 2010 census, the township has a total area of 35.61 square miles (92.2 km2), of which 35.24 square miles (91.3 km2) (or 98.96%) is land and 0.37 square miles (0.96 km2) (or 1.04%) is water.

[2] The township contains ten cemeteries: Denny, Evans, Haven, Kennedy, Markles, Phillips, Roselawn Memorial Park, Steveson, Stewart and Wood.