Jefferson County

County population

Year	Population
1980.	35667
1990.	37020
2000.	40045
2010.	38827

Details Jefferson County Jefferson County

www.jeffil.us/

Illinois

Jefferson County

County

17081

County seat is in Mount Vernon
Founded in 1819
Area: 571 square miles
County board has 1 members
FIPS code: 17081


Zipcodes in Jefferson County: 62866, 62864, 62830, 62872, 62883, 62889, 62846, 62894, 62898, 62816, 62814, 62810

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