Town Hall Address 59 S Somonauk Rd PO Box 519 Cortland, IL 60112-0519 United States- DeKalb County Website https://www.cortlandil.org/ Water 815-756-9684 100 S Llanos St Cortland, IL 60112 United States Tax Collector 815-895-7120 110 East Sycamore Street Sycamore, IL 60178 United States Town Hall Hours M-F 8:30am-4:30pm County DeKalb