Mattress Firm Frederick South is located in Frederick MD, Zip Code: 21704 on the street of 5010 Buckeystown Pike. If you want to ask something about the furniture, mattresses, catalog, pricing, hours and directions, the Phone number is 301-228-2785. The coordinates that you can use in navigation applications to find Mattress Firm Frederick South quickly are 39.370896 -77.411645 USA