Mattress Firm is located in Knoxville TN, Zip Code: 37912 on the street of 6708 Clinton Hwy. If you want to ask something about the furniture quality, mattresses sizes, catalog prices or any information, the Phone number is 865-947-1528. The coordinates that you can use in navigation applications to find Mattress Firm quickly are 35.91474 -84.08208 USA