Johnson County

County population

Year	Population
1980.	9614
1990.	11347
2000.	12878
2010.	12582

Details Johnson County Johnson County

Illinois

Johnson County

County

17087

County seat is in Vienna
Founded in 1812
Area: 346 square miles
County board has 3 members
FIPS code: 17087


Zipcodes in Johnson County: 62985, 62908, 62909, 62943, 62972, 62939, 62923, 62967, 62991, 62995, 62912

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