Mattress Firm Northgate is located in Seattle WA, Zip Code: 98125 on the street of 551 NE Northgate Way, Ste A. If you want to ask something about the furniture, mattresses, catalog, pricing, hours and directions, the Phone number is 206-364-1380. The coordinates that you can use in navigation applications to find Mattress Firm Northgate quickly are 47.70829 -122.32089 USA