Green Garden Township is located between the villages of Manhattan and Monee and straight south of Frankfort. The center of the township is the intersection of Manhattan-Monee and Center roads. From the center, the township extends three miles in each direction; north, west, south, and east, for a total of 36 square miles. The population was 2,556 at the 2000 census. Green Garden Township was formed from the eastern half of Trenton Township at an unknown date.