John David Treadgold, LVO (30 December 1931 – 15 February 2015) was an Anglican priest.
Born on 30 December 1931 and educated at the University of Nottingham, he was ordained after a period of study at Wells Theological College in 1960. He was the Vicar Choral at Southwell Minster and then held incumbencies at Wollaton and Darlington. A canon at St. George's Chapel, Windsor Castle, he became Dean of Chichester in 1989, retiring in 2001. A carved gargoyle at Chichester Cathedral was inspired by his face.
He died on 15 February 2015.