Iuka Township is located in Marion County, Illinois. As of the 2010 census, its population was 999 and it contained 443 housing units.
Iuka Township (T2N R4E) is centered at 38ð38'N 88ð45'W (38.636,-88.758). It is traversed eastâÂÂwest by U.S. Route 50. According to the 2010 census, the township has a total area of , of which (or 99.83%) is land and (or 0.17%) is water.