Joynes is a surname, derived from John. Notable people with the surname include:
Dickie Joynes (1877–1949), English football player Edward Southey Joynes (1834–1917), American academic Jason Joynes (1979–2024), Australian basketball player Nathan Joynes (born 1985), English football player William T. Joynes (1817–1874), American politician and jurist