Mattress Firm Seattle Downtown is located in Seattle WA, Zip Code: 98101 on the street of 1900 3rd Ave. If you want to ask something about the furniture, mattresses, catalog, pricing, hours and directions, the Phone number is 206-464-1513. The coordinates that you can use in navigation applications to find Mattress Firm Seattle Downtown quickly are 47.61191 -122.33972 USA