Pin Oak Township, Madison County, Illinois

Pin Oak Township is located in Madison County, Illinois, in the United States. As of the 2010 census, its population was 3,916 and it contained 1,379 housing units.

History
Pin Oak Township was named from a grove of pin oak trees.

Geography
According to the 2010 census, the township has a total area of 36.06 sqmi, of which 35.59 sqmi (or 98.70%) is land and 0.47 sqmi (or 1.30%) is water.