Dynes is a surname. Notable people with the surname include:
Ernest Dynes (1903–1968), cricketer Kieran Dynes (born 1970), racing driver Robert C. Dynes (1942–2025), Canadian-American physicist, researcher, academic administrator, and professor Wayne R. Dynes (1934–2021), art historian William Dynes (1849–1935), politician
See also Dyne, unit of force Dyne (name) Dynes Pedersen (1893–1960), gymnast