- Fairfield-Wayne Co. Area Development Commission 107 Northeast Second St. Fairfield, Illinois 62837 (618) 842-4802/FAX: (618) 842-5654 fwcadc@midwest.net Fairfield-IL.com Your Personal Pathway to the Friendliest Town in Southeastern Illinois We're glad you decided to drop by. Why not stay a while. Visit our rural landscape. You'll see a patchwork of businesses, industry, agriculture and oil ...www.fairfield-il.com