Maddux House, also known as Maddux's Island, Maddux's Warehouse, Inclosure, and Capt. William T. Ford House, is a historic home located at Upper Fairmount, Somerset County, Maryland. It is located on a high ridge of land overlooking the Manokin River and Back Creek. It is a two-story, six-bay, "L"-shaped frame house with steeply pitched roofs. The house dates to the 18th century, with an addition dating to around 1850-60.