Mount Pleasant Township is located in Whiteside County, Illinois.

As of the 2010 census, its population was 4,939 and it contained 2,176 housing units.

[2] According to the 2010 census, the township has a total area of 35.84 square miles (92.8 km2), of which 35.8 square miles (93 km2) (or 99.89%) is land and 0.03 square miles (0.078 km2) (or 0.08%) is water.

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