Mississippi Township is one of eleven townships in Jersey County, Illinois, United States.

As of the 2010 census, its population was 2,041 and it contained 804 housing units.

[2] According to the 2010 census, the township has a total area of 36.35 square miles (94.1 km2), of which 36.3 square miles (94 km2) (or 99.86%) is land and 0.04 square miles (0.10 km2) (or 0.11%) is water.

[2] The township contains these five cemeteries: Bethel, Lamb Memorial, Lurton, Newbern and Van Horn.