Shacklock is a surname. Notable people with the surname include:
Alan Shacklock (born 1950), English musician Constance Shacklock (1913–1999), English contralto Frank Shacklock (1861 – 1 May 1937), English cricketer Henry Ely Shacklock (1839–1902), Kiwi iron moulder and manufacturer Kerry Shacklock (born 1971), English swimmer Michael Shacklock (born 2008), Singaporean sprinter
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