Blandinsville Township is located in McDonough County, Illinois.

As of the 2010 census, its population was 846 and it contained 445 housing units.

[2] According to the 2010 census, the township has a total area of 37.39 square miles (96.8 km2), of which 37.38 square miles (96.8 km2) (or 99.97%) is land and 0.01 square miles (0.026 km2) (or 0.03%) is water.

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