Town Hall Address 302 5th St Illiopolis, IL 62539 United States- Sangamon County Website https://illiopolis.illinois.gov/ Zoning (217) 486-2511 302 5th St Illiopolis, IL 62539 United States Fire District (217) 486-7691 428 Mary St. Illiopolis, IL 62539 United States Town Clerk (217) 486-2511 302 5th St Illiopolis, IL 62539 United States Tax Collector 217-753-6800 200 S. Ninth St. Springfield, IL 62702 United States Town Hall Hours M-F 9am-1pm County Sangamon