Mattress Firm is located in Centereach NY, Zip Code: 11720 on the street of 1959 Middle Country Rd. If you want to ask something about the furniture, mattresses, catalog, pricing, hours and directions, the Phone number is 631-389-4982. The coordinates that you can use in navigation applications to find Mattress Firm quickly are 40.85874 -73.08101 USA