Grundy County, Illinois

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Grundy County is a county located in the U.S. state of Illinois. As of 2000, the population was 37,535. Its county seat is Morris.[1] The center of population of Illinois is located in Grundy County, in the village of Mazon.[2] This county is part of the Chicago metropolitan area. Illinois' State Fossil, the unique and bizarre Tully Monster was first found in Mazon Creek. Grundy County Speedway is located in Morris.

Contents

Geography

According to the U.S. Census Bureau, the county has a total area of 430 square miles (1,113.7 km2), of which 420 square miles (1,087.8 km2) is land and 11 square miles (28.5 km2) (2.44%) is water.

Major highways

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