ChamberMaster Template Slingerland & Clark, P.C. Share: Legal Services Slingerland & Clark, P.C. Visit Website 499 E. State St. Sycamore, IL 60178 (815) 895-5141 (815) 895-8567 (fax) Map What's Nearby? Distance: 5 10 15 20 25 50 mi.