Du Boulay is a surname, and may refer to:
Arthur du Boulay (1880–1918), British military officer César-Egasse du Boulay (died 1678), French historian Clair du Boulay, British expert in pathology and medical education F. R. H. Du Boulay (1920–2008), British medieval historian Francis Houssemayne du Boulay (1837–1914), Australian naturalist and musician François Jacques Houssemayne Du Boulay (1759–1828), British financier Henry Du Boulay (1840–1925), Archdeacon of Bodmin, Cornwall James Houssemayne Du Boulay (1868–1943), British civil servant in India Sir Roger Du Boulay (1922–2020), British diplomat Shirley du Boulay (1933–2023), British author and biographer Benedict du Boulay, British computer scientist
See also Boulay