Mattress Firm Dundalk is located in Dundalk MD, Zip Code: 21222 on the street of 1417 Merritt Blvd. If you want to ask something about the furniture, mattresses, catalog, pricing, hours and directions, the Phone number is 410-284-0242. The coordinates that you can use in navigation applications to find Mattress Firm Dundalk quickly are 39.27818 -76.50429 USA