Hours Of Operations Mattress Firm Illinois Dekalb Mattress Firm Hours of Operation and Locations in Dekalb, IL 4.8 - 220 votes 1 Locations in Dekalb www.mattressfirm.com Mattress Firm Hours Category: Home & Garden Mattress Firm - Dekalb, IL 60115 2395 Sycamore Rd(815) 758-4320 View Store Details Explore DekalbView More Apparel TJ MaxxRoss Dress for LessDealsCarter'sJCPenney Sports TargetColemanDSWSporting Goods IncorporatedAll Sports Jewelry Hobby LobbyKohl's OutletKay JewelersCarson'sGoldmax Recommend For You Mickey Shorr Milestones Milwaukee PC Mori Luggage & Gifts MyEyeDr New Seasons Market Old Time Pottery Pac Sun Pacific Sunwear Party Depot