Town Hall Address 255 S Lincoln O'Fallon, IL 62269 United States- St. Clair County Website https://www.ofallon.org/ Zoning (618) 624-4500 4 255 S Lincoln Avenue 2nd Floor O'Fallon, IL 62269 United States Fire District (618) 624-4519 106 E Washington O'Fallon, IL 62269 United States Town Clerk (618) 624-4500 8715 255 S Lincoln Ave O'Fallon, IL 62269 United States Water 618-624-4500 3 255 S Lincoln Ave O'Fallon, IL 62269 United States Tax Collector (618) 624-4500 255 S Lincoln Ave O'Fallon, IL 62269 United States Town Hall Hours M-F 8am-5pm County St. Clair