Joynson is a surname, and may refer to:
Gillian Joynson-Hicks (1942–2024), British Anglican evangelical and activist Lancelot Joynson-Hicks, 3rd Viscount Brentford (1902–1983), English solicitor and politician Mary Joynson (1924–2013), British childcare worker William Joynson (1917–2000), British Army officer and William Joynson-Hicks, 1st Viscount Brentford (1865–1932), English solicitor and politician
See also Johnson (surname)