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Grundy County, Illinois

County in Illinois, United States / From Wikipedia, the free encyclopedia

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Grundy County is a county in the U.S. state of Illinois. According to the 2010 census, it has a population of 50,063.[1] Its county seat is Morris.[2]

Quick facts: Grundy County, Country, State, Founded, Named...
Grundy County
Grundy County Courthouse
Grundy County Courthouse
Map of Illinois highlighting Grundy County
Location within the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location within the U.S.
Coordinates: 41°17′N 88°26′W
CountryFlag_of_the_United_States.svg United States
StateFlag_of_Illinois.svg Illinois
FoundedFebruary 17, 1841
Named forFelix Grundy
Largest cityMorris
  Total430 sq mi (1,100 km2)
  Land418 sq mi (1,080 km2)
  Water12 sq mi (30 km2)  2.9%
  Density120/sq mi (45/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district16th

Grundy County is part of the Chicago-Naperville-Elgin, IL-IN-WI Metropolitan Statistical Area.

In 2010, the center of population of Illinois was in Grundy County, just northeast of the village of Mazon.[3]

Illinois's state fossil, the unique and bizarre Tully Monster, was first found in Mazon Creek. Grundy County is home to Dresden Generating Station—the first privately financed nuclear power plant built in the United States—and the Morris Operation—the only de facto high-level radioactive waste storage site in the United States.