Hours Of Operations ADT Illinois Marengo ADT Hours of Operation and Locations in Marengo, IL 4.7 - 140 votes 1 Locations in Marengo www.adt.com ADT Hours Category: Home & Garden ADT - Marengo, IL 60152 101101 South St(815) 214-9314 View Store Details Explore MarengoView More Apparel TJ MaxxCarharttSierra DesignsExpress Sports Snap FitnessSports TimeBasic BasicSierra DesignsSport Center Jewelry Cash for Gold Recommend For You Stacy Furniture Build-A Bear Workshop J. C. Penney 84 Lumber A.C. Moore Arts & Crafts Adams Golf American Standard American TV & Appliance Andersen Windows & Doors Andronico's Market