Horlock is a surname. Notable people with the surname include:
Alfred Horlock (born 1822) British engineer Brian Horlock (born 1931), British Anglican priest Ernest George Horlock (1885–1917), British Army soldier and Victoria Cross recipient John Horlock (born 1928), British engineer Kevin Horlock (born 1972), English-born Northern Ireland footballer
See also A. Horlock and Co, a British marine and locomotive engineering company