As of the 2010 census, its population was 47,653 and it contained 19,120 housing units.

[2] McHenry Township shares the distinction with Nunda Township as being the two largest townships by land area in McHenry County, at 48.3 square miles (125 km2) each.

The township was named for William McHenry, an Illinois politician.

[3] According to the 2010 census, the township has a total area of 48.03 square miles (124.4 km2), of which 44.74 square miles (115.9 km2) (or 93.15%) is land and 3.3 square miles (8.5 km2) (or 6.87%) is water.

This McHenry County, Illinois location article is a stub.