Jackett is a surname. Notable people with the surname include:
Frank Jackett (1927–2010), Welsh footballer Gordon Jackett (1887–1951), Australian politician John Jackett (politician) (1912–2003), Australian politician John Jackett (rugby union) (1878–1935), English international rugby union player, brother of Richard Kenny Jackett (born 1962), Welsh international footballer Richard Jackett (1880–1960), Cornish rugby union player, brother of Edward Wilbur Jackett (1912–2005), Canadian public servant and chief justice
See also Jackett (clothing), a type of jacket