Tannock is a surname, and may refer to:
Charles Tannock, British politician and psychiatrist Colin Tannock (1891–1972), Scottish-born Australian politician David Tannock (1873–1952), New Zealand horticulturist James Tannock (1784–1863), Scottish portrait painter Peter Tannock (born 1940), Australian rules football administrator Ross Tannock (born 1971), Scottish footballer