 He lived on Delafield Island until his death in 1955.His daughter Elizabeth Van Rensselaer Delafield (1908–1983) lived on Delafield Island for many years.She had two children from her first marriage to the architect Robert Spurgeon; And two children from her second marriage to the attorney Frank A. Zunino Jr.

Francis Delafield was of the family of Count de la Feld, which dates back to the darkest period of the Middle Ages (about the sixth century) and seated at the Chateaux of La Feld, in Alsace (extensive ruins still remain).