Duncan Henry Davidson (born 29 March 1941) is the founder of Persimmon plc, one of the United Kingdom's largest housebuilding businesses.
Born the grandson of the 15th Duke of Norfolk and educated at Ampleforth College, Davidson went into the British Army in 1959 and served in the Royal Scots Greys for four years. In 1963 he joined George Wimpey where he managed construction work in Iran.
In 1965 he founded Ryedale Homes which he sold seven years later to Comben Homes for £1m.
In 1972 he founded Persimmon plc and expanded it into one of the United Kingdom's largest housebuilding businesses. He retired as Executive Chairman in 2006 but remains Life President.
He owns 20,000 acres (81 km2) of land in Northumberland and lives at Lilburn Tower near Wooler.
Duncan Davidson married Sarah in 1966; the couple have four daughters.