Vermillion Township is located in LaSalle County, Illinois.

As of the 2010 census, its population was 387 and it contained 166 housing units.

[3] According to the 2010 census, the township has a total area of 23.09 square miles (59.8 km2), of which 23.05 square miles (59.7 km2) (or 99.83%) is land and 0.04 square miles (0.10 km2) (or 0.17%) is water.

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