Monticello Main Street, Inc. is a nonprofit program of The National Trust for Historic Preservation, dedicated to the revitalization of our historic downtown. Monticello is accredited both as an Illinois and National Main Street community. Monticello Main Street © | PO Box 392, Monticello, IL 61856 | Tel: (217) 762-9318 | Fax: (217) 762-9713 | info@monticellomainstreet.org Copyright © 2006-