South Otter Township (T11N R7W) is located in Macoupin County, Illinois, United States. As of the 2010 census, its population was 465 and it contained 204 housing units.[2]
Geography
According to the 2010 census, the township has a total area of 36.41 square miles (94.3 km2), of which 35.77 square miles (92.6 km2) (or 98.24%) is land and 0.63 square miles (1.6 km2) (or 1.73%) is water.[2]