Forrest Township is located in Livingston County, Illinois. As of the 2010 census, its population was 1,605 and it contained 627 housing units. Forrest Township formed from a portion of Chatsworth Township as Forrestville Township in 1861, but then changed its name to just Forrest in 1865. Geography According to the 2010 census, the township has a total area of , all land. Demographics References External links US Census City-data.com Illinois State Archives Townships in Livingston County, Illinois Populated places established in 1861 Townships in Illinois 1861 establishments in Illinois