Malachi or Malachai is the given name of:
Malachi, Jewish prophet in the Bible
Malachi ben Jacob HaKohen (1695/70?–1772), Talmudist, methodologist and Kaballist
Malachi Bogdanov, British theatre director
Malachi Curran, politician in Northern Ireland
Malachi Cush (born 1980), Northern Irish singer/songwriter
Malachi Davis (born 1977), American sprinter
Malachi Dupre, American football player
Malachi Favors (1927–2004), American jazz bassist
Malachi Jones (born 1989), Bermudian cricketer
Malachi Jones (clergyman) (c.1651–1729), Anglo-Welsh clergyman and missionary
Malachi Kittridge (1869-1928), American Major League Baseball catcher
Malachi Leo Elliott (1886–1967), American architect
Malachi Martin (1921–1999), Catholic priest, writer and commentator
Malachi Martin (Australian murderer) (c.1831–1862)
Malachi O'Doherty (born 1951), journalist, author and broadcaster in Northern Ireland
Malachi Ritscher (1954–2006), American human rights and anti-war activist and musician
Malachi Thompson (1949–2006), American jazz trumpet player
Malachi Throne (1928-2013), American actor
Malachi Malasgrowther, a pseudonym used by writer Walter Scott in a series of letters to the Edinburgh Weekly Journal
Prince Malachi (born Mark Wynter in 1969), English reggae singer
Malachi Constant, character of a Kurt Vonnegut's book The Sirens of Titan
