Monroe County

Columbia
Hecker
Valmeyer
Waterloo
HASC code :US-IL-MR
FIPS 6-4 code :17133
Capital :Waterloo
Largest city :Columbia
Elevation :High : Waterloo 717 ft
Low : Valmeyer 401 ft
Population :27,619
Land Area :388 sq mi
(1,005 km²)
Density :71.18/sq mi
(27.48/km²)
Time zone :UTC -6