St clair county parcel map viewer. Untitled map - St. Clair County, Illinois, with this interactive ArcGIS web application. Clair County's interactive parcel map viewer for detailed geographic information and property data. ArcGIS Web Application Explore St. Clair County Parcel Map Viewer for property information with spatial data and disclaimers on accuracy and updates. . Geocortex Viewer for HTML5 conforms to WCAG 2. Built upon esri®technology using VertiGIS Geocortex. The Parcel Inquiry will allow you to access information directly from the Assessor's and Treasurer's parcel database. The map tools will allow you to visually find parcels and data. cuq5wpieeokvf3bc9dq3ovimrjvqzfejt5qlasttybpwrruvm