 The son of Ellis Hicks Beach (1874–1943) by his marriage to Nancy Whitehead, he was the grandson of William Frederick Hicks-Beach (1841–1923), a younger brother of Michael Hicks Beach, 1st Earl St Aldwyn.On 12 September 1939 Hicks-Beach married Diana Hoare (1911–2002), a daughter of Christopher Gurney Hoare, and they had two daughters, Elizabeth (later Mrs Hinson) and Rosemary (later Mrs Naylor), and one son, Mark Hicks Beach (1943–1998).He is buried in the churchyard of St Mary's, Great Witcombe, Gloucestershire.