Allens Grove Township, Mason County, Illinois

Allens Grove Township is located in Mason County, Illinois. As of the 2010 census, its population was 586 and it contained 255 housing units.

Geography
According to the 2010 census, the township has a total area of 35.77 sqmi, of which 35.72 sqmi (or 99.86%) is land and 0.04 sqmi (or 0.11%) is water.