Ephraim Gilman (July 12, 1778 - February 22, 1853) was an American cartographer who served as the Principal Draftsman of the General Land Office in the mid 19th century. Gilman was born in Gilmanton, New Hampshire. He was married to Anna Gilman (1787 - 1846). There are records of an Ephraim Gilman who owed a successful trunk manufactory in Alexandria, Virginia, although if this is the same figure who drafted maps for the GLO, it is unclear - but it seems unlikely that such a wealthy and prosperous businessman would transition into public service late in life and at so modest a level.

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