Hildyard is a surname. Notable people with the surname include:
Sir Christopher Hilliard (1567-1634), also known as Christopher Hildyard, English landowner and politician, MP at various times between 1589 and 1629
Henry Hildyard (MP) (1610–1674), MP for Hedon in the 1660 Convention Parliament
Henry Hildyard (1846–1916), British Army general
Jack Hildyard
James Hildyard
Katrine Hildyard, Australian politician
Lyonel Hildyard
Reginald Hildyard (1876–1965), British Army general
Sir Robert Hildyard, 2nd Baronet
Thomas Thoroton-Hildyard
Daniel Thomas Hildyard