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is a village in Cook County, Illinois, United States. The population was 2,582 at the 2000 census. Thornton is home to the Thornton Quarry, one of the largest quarries in the world.
According to the United States Census Bureau, the village has a total area of 2.4 square miles (6.2 km²), of which, 2.3 square miles (6.0 km²) of it is land and 0.04 square miles (0.1 km²) of it (1.68%) is water.