Coordinates: 51°58′23″N 1°04′08″W / 51.973°N 1.069°W / 51.973; -1.069
Barton Hartshorn is a civil parish about 4 miles (6.4 km) southwest of Buckingham in the Aylesbury Vale district of Buckinghamshire. Its southern boundary is a brook called the Birne, and this and the parish's western boundary form part of the county boundary with Oxfordshire.
The toponym "Barton" is derived from the Old English for "Barley Farm", and is a common place name in England. In the 11th century it was recorded as Bertone. In the 15th century it was recorded as Barton Hertishorne and Beggars Barton, and in the 16th century it was Little Barton. "Hartshorn" comes from a separate hamlet in the same parish and is thought to refer to the shape of the land locally: it lies in the shape of a deer's horn.
Before the Norman Conquest of England Wilaf, a Thegn of Earl Leofwine Godwinson, held the manor. The Domesday Book of 1086 records that it was one of the extensive landholdings of Odo, Bishop of Bayeux. However, by then Odo had already been imprisoned for disobeying William I and forfeited his estates to the Crown.