Mattress Firm Merrillville is located in Merrillville IN, Zip Code: 46410 on the street of 1307 E 79th Ave. If you want to ask something about the furniture, mattresses, catalog, pricing, hours and directions, the Phone number is 219-769-5643. The coordinates that you can use in navigation applications to find Mattress Firm Merrillville quickly are 41.56368 -87.50883 USA