Whitelock is a surname. Notable people with the surname include:
Thomas Whitelock Kempthorne (1834–1915), New Zealand manufacturing chemist and businessmanHenry Whitelock Torrens (1806–1852), son of Major Henry TorrensAdam Whitelock (born 1987), New Zealand rugby union footballerDorothy Whitelock (1901–1982), English historianGeorge Whitelock (born 1986), rugby union playerJohn Whitelock (1757–1833), British army officerLoran Whitelock, American botanist who specializes in CycadsLuke Whitelock (born 1991), New Zealand rugby union footballerMax Whitelock (born 1993), English gymnast from Hertfordshire, UKSam Whitelock (born 1988), New Zealand born rugby player