Hittle Township is located in Tazewell County, Illinois. As of the 2010 census, its population was 591 and it contained 254 housing units. Hittle Township was originally called Union Township. The name was changed from Union to Waterford Township on May 20, 1850, and again from Waterford to Armington Township in August, 1850. Armington was changed to Hittle though on November 11 of that same year.
According to the 2010 census, the township has a total area of 30.26 square miles (78.4 km2), of which 30.25 square miles (78.3 km2) (or 99.97%) is land and 0.01 square miles (0.026 km2) (or 0.03%) is water.