For Sale - Development lot in Forsyth, Illinois. Situated on U.S. Route 51 and within the Forsyth TIF boundaries. Developer Incentives Available! The lot totals 4.07 acres and includes 200 feet of frontage. Forsyth is a popular suburb of Decatur, Illinois is the top retail trade area in Macon County. Centrally located and easily accessible from Interstate 72. Contact broker for more information.