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New Design, Illinois

Monroe County, Illinois
Monroe County Courthouse, Waterloo.jpg
Monroe County Courthouse, Waterloo
Map of Illinois highlighting Monroe County
Location in the U.S. state of Illinois
Map of the United States highlighting Illinois
Illinois's location in the U.S.
Founded 1816
Named for James Monroe
Seat Waterloo
Largest city Waterloo
Area
 • Total 398 sq mi (1,031 km2)
 • Land 385 sq mi (997 km2)
 • Water 13 sq mi (34 km2), 3.3%
Population
 • (2010) 32,957
 • Density 86/sq mi (33/km²)
Congressional district 12th
Time zone Central: UTC-6/-5
Website www.monroecountyil.org
Waterloo, Illinois
Climate chart ()
J F M A M J J A S O N D
 
 
2.3
 
 
38
20
 
 
2.4
 
 
44
25
 
 
3.7
 
 
55
35
 
 
4.2
 
 
66
45
 
 
4
 
 
76
55
 
 
4
 
 
84
64
 
 
4.3
 
 
89
68
 
 
3.1
 
 
87
66
 
 
3.4
 
 
80
59
 
 
3.1
 
 
69
47
 
 
4.2
 
 
54
36
 
 
3.4
 
 
42
25
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
 
 
2.3
 
 
38
20
 
 
2.4
 
 
44
25
 
 
3.7
 
 
55
35
 
 
4.2
 
 
66
45
 
 
4
 
 
76
55
 
 
4
 
 
84
64
 
 
4.3
 
 
89
68
 
 
3.1
 
 
87
66
 
 
3.4
 
 
80
59
 
 
3.1
 
 
69
47
 
 
4.2
 
 
54
36
 
 
3.4
 
 
42
25
Average max. and min. temperatures in °F
Precipitation totals in inches
Source: The Weather Channel