Henderson/ Mercer/ Warren Unit Warren County Office
1000 North Main Street
P.O. Box 227
Monmouth, IL 61462-0227
Phone: 309-734-5161 FAX: 309-734-5532 Email Us
Henderson County Office
410 E. Main, PO Box 540
Stronghurst, IL 61480
Phone: 309-924-1163 FAX: 309-924-1164 Email Us
Mercer County Office
702 S.E. Third Street
Aledo, IL 61231
Phone: 309-582-5106 FAX: 309-582-7338 Email Us
Mercer Economic Development Partnership
2106 SE Third Street
Aledo, IL 61231
Phone: 309-582-7695 Visit website
Western Illinois Economic Development Partnership
88 Public Square
Monmouth, IL 61462
Phone: 309-734-4253 FAX: 309-734-8811 Visit website
Henderson/ Mercer/ Warren Unit