Westbury is a surname. Notable people with the surname include:
David Westbury (1923–1983), English physician Edgar T. Westbury (1896–1970), British model engineer Frank Atha Westbury (1838–1901), British author, popular in Australia and New Zealand Gerald Westbury (1927–2014), English surgeon who pioneered treatments for cancer Isabelle Westbury (born 1990), English cricketer Jayne Westbury (born 1957), English former cyclist John Westbury (died c. 1440/49), MP for Wiltshire in 1417 and 1419 June Westbury (1921–2004), Canadian politician born in New Zealand Katherine Westbury (born 1993), Thai-New Zealand tennis player Ken Westbury (1927–2023), British cinematographer Marcus Westbury (born 1974), Australian festival director Marjorie Westbury (1905–1989), English actress and singer Paul Westbury, business executive Peter Westbury (1938–2015), British racing driver Richard Bethell, 1st Baron Westbury (1800–1873), Lord Chancellor of Great Britain William de Westbury (died c. 1440), English judge