Posted on January 1, 2019 January 1, 2019 by WebsiteYellowPages.com US Post Office 1 2 3 4 50.000 CategoriesPost Offices LocationsIllinois Bookmark Contact Information Business Name US Post Office Address 411 E Monroe St, Illinois 62701-1439 Phone Number 2567284493 Fax Number 2177533432 Website http://www.usps.com CategoriesPost Offices Post navigationPrevious post: Phil GiostaNext post: Indiana Nut Growers Association