List of Longhorn Steakhouse Stores in Upper Marlboro, MD Outlet Note Regular Brands Longhorn Steakhouse Maryland Upper Marlboro Rating 5 based on 75 votes Official Website http://www.longhornsteakhouse.com/ Products Food Starters NameAddressPhone Name/Address/Phone Longhorn Steakhouse outlet - Upper Marlboro 1100 Capital Center Blvd (301) 276-4413 People Also Viewed