Richview Township is located in Washington County, Illinois.

As of the 2010 census, its population was 343 and it contained 170 housing units.

[2] According to the 2010 census, the township has a total area of 11.99 square miles (31.1 km2), of which 11.97 square miles (31.0 km2) (or 99.83%) is land and 0.02 square miles (0.052 km2) (or 0.17%) is water.

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