Mattress Firm Clayton is located in Saint Louis MO, Zip Code: 63117 on the street of 8069 Clayton Rd. If you want to ask something about the furniture, mattresses, catalog, pricing, hours and directions, the Phone number is 314-721-2988. The coordinates that you can use in navigation applications to find Mattress Firm Clayton quickly are 38.6346 -90.34509 USA