Oconee Township is located in Shelby County, Illinois.

As of the 2010 census, its population was 776 and it contained 373 housing units.

[2] According to the 2010 census, the township has a total area of 55.2 square miles (143 km2), of which 55.11 square miles (142.7 km2) (or 99.84%) is land and 0.08 square miles (0.21 km2) (or 0.14%) is water.

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