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County

NameStatusPopulation
census
2000-04-01
Population
census
2010-04-01
Population
estimate
2012-07-01
 
MonroeCounty27,62532,95733,357
IllinoisFederal State12,419,92712,830,63212,875,255

Contents: Incorporated Places

Name StatusCountyPopulation
census
2000-04-01
Population
census
2010-04-01
Population
estimate
2012-07-01
 
ColumbiaCitySt. Clair / Monroe7,8759,6829,896
FultsVillageMonroe282626
HeckerVillageSt. Clair / Monroe470481480
MaeystownVillageMonroe138157157
ValmeyerVillageMonroe6121,2631,271
WaterlooCityMonroe8,1109,8169,947

Source: US Census Bureau (web).
2000 population of places in the boundaries of 2010. Later population figures for places in the boundaries of 2012.