Charles Mason

Charles Mason
Artist's impression (1910) of Mason surveying the Mason–Dixon line
Born25 April 1728 (baptised 1 May)[1]
Died25 October 1786(1786-10-25) (aged 58)
NationalityKingdom of Great Britain
Known forMason–Dixon line
Scientific career
FieldsAstronomy, surveying
Signature

Charles Mason (25 April 1728[1] – 25 October 1786) was a British-American astronomer who made significant contributions to 18th-century science and American history, particularly through his survey with Jeremiah Dixon of the Mason–Dixon line, which came to mark the border between Maryland and Pennsylvania (1764–1768). The border between Delaware and Maryland is also defined by a part of the Mason–Dixon line.