Ridsdale is a surname. Notable people with the surname include:
Aurelian Ridsdale (1864–1923), British Liberal politician Charles Ridsdale (1873–1952), Anglican bishop George Ridsdale (1878–?), English footballer Gerald Ridsdale (1934–2025), convicted child molester and Catholic priest J Ridsdale, English footballer Julian Ridsdale (1915–2004), British National Liberal and later Conservative Party politician Leone Ridsdale, English neurologist Paddy Ridsdale (1921–2009), Ian Fleming's secretary during World War II Peter Ridsdale (born 1952), English businessman Philip Ridsdale (1915–2000), Anglican bishop Robert Ridsdale (1783–1857), English race horse breeder Septimus Ridsdale (1840–1884), English cricketer
Ridsdale is also the name of a village in Corsenside, and an old spelling of Redesdale, both in Northumberland, England.