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Washington County, Illinois

Washington County, Illinois
Washington County Courthouse in Nashville.jpg
Washington County Courthouse in Nashville
Flag of Washington County, Illinois
Flag
Seal of Washington County, Illinois
Seal
Map of Illinois highlighting Washington County
Location in the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location in the U.S.
Founded January 2, 1818
Named for George Washington
Seat Nashville
Largest city Nashville
Area
 • Total 564 sq mi (1,461 km2)
 • Land 563 sq mi (1,458 km2)
 • Water 1.3 sq mi (3 km2), 0.2%
Population
 • (2010) 14,716
 • Density 26/sq mi (10/km²)
Congressional district 15th
Time zone Central: UTC-6/-5
Website www.washingtonco.illinois.gov
Nashville, Illinois
Climate chart ()
J F M A M J J A S O N D
 
 
2.2
 
 
38
22
 
 
2.3
 
 
44
27
 
 
3.5
 
 
56
35
 
 
3.9
 
 
67
45
 
 
4.1
 
 
76
55
 
 
3.7
 
 
85
64
 
 
3.7
 
 
88
68
 
 
2.7
 
 
87
65
 
 
3.2
 
 
80
58
 
 
3
 
 
69
47
 
 
3.8
 
 
54
37
 
 
3
 
 
42
26
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel
J F M A M J J A S O N D
 
 
2.2
 
 
38
22
 
 
2.3
 
 
44
27
 
 
3.5
 
 
56
35
 
 
3.9
 
 
67
45
 
 
4.1
 
 
76
55
 
 
3.7
 
 
85
64
 
 
3.7
 
 
88
68
 
 
2.7
 
 
87
65
 
 
3.2
 
 
80
58
 
 
3
 
 
69
47
 
 
3.8
 
 
54
37
 
 
3
 
 
42
26
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel