He married Helen Elizabeth Ward, granddaughter of
William Ward, 1st Earl of Dudley, on 27 April 1931. They had three children: • Lady Theresa Jane Fox-Strangways (12 August 1932 - 1989), married
Simon Monckton-Arundell, 9th Viscount Galway • Giles Henry Holland Fox-Strangways (7 May 1934 - 2 September 1947, accidental death) • Charles Stephen Fox-Strangways (6 May 1938 - 8 July 1958, killed while on emergency military operations in
Cyprus) With no surviving male issue, he was succeeded in the Earldom of Ilchester by
Walter Angelo Fox-Strangways, a descendant of the 1st Earl of Ilchester and Harry's fifth cousin, once removed, but his family seat of
Melbury House in Dorset and large estates were inherited by his daughter Theresa, Viscountess Galway. ==Arms==