Flagstaff (also known as Flag Staff) is a former plantation, now an unorganized territory (township) in the Northwest Somerset townships of Somerset County, Maine. Flagstaff Plantation was organized from Township 4 R4 BKP WKR in 1851, 1865, 1870, and 1895. The plantation organization was surrendered in 1951, and since then it has been an unorganized territory. The original settlement was submerged after 1950 by an enlarged lake after the Dead River was dammed. 
- ↑ Maine Historical Records Survey Project, Division of Professional and Service Projects, Work Projects Administration, Counties, Cities, Towns, and Plantations of Maine: a Handbook of Incorporations, Dissolutions, and Boundary Changes (Portland, Maine: The Survey, 1940), 75 (digital p. 84). A digital version is available via a link in the FamilySearch Catalog.
- ↑ Flagstaff Township, Somerset County, Maine in Maine Genealogy (accessed 6 June 2013).
- ↑ Flagstaff, Maine in Wikipedia: the Free Encyclopedia (accessed 6 June 2013).