Registration summary
St. Clair County, Illinois has a recorded population of 251,149. For registration, the page currently shows address records: ~ 1,845, temporary registration cases: ~ 11, address error points: ~ 7, verification cases: ~ 18, residents covered: 251,149. The figures use the available U.S. geography, population, housing and local-structure data for this place.
Calculated from U.S. geography, population and local structure. Public messages are moderated before publication.