Greig is a Scottish surname. It is one of many names adopted by members of the Clan MacGregor by those who migrated to Aberdeenshire about 1580-1600. Greig is also a common mis-spelling of the surname of Edvard Grieg, the Norwegian composer. Grieg's great-grandfather was a Scot with the surname Greig who settled in Norway. Greig is the name of some places in the United States of America:
- Cape Greig in Alaska
- Greig a town in Lewis County, New York
Greig is the name of a school in North London:
Greig is the name of a genetic disorder
Greig is the surname of several people:
- Alexey Greig, the Russian Admiral, son of Samuel Greig
- Andrew Greig, the Scottish writer
- Brian Greig, the Australian politician
- Charlotte Greig, the Maltese journalist, singer and songwriter
- Cynthia Greig, American artist and author
- Doug Greig, the Canadian soccer player
- Flos Greig, the first female barrister and solicitor in Australia
- Gavin Greig, the collector of Scottish folk songs
- Geoffrey Greig, the English cricketer
- Ian Greig, the English cricketer, brother of Tony Greig
- J. G. Greig, the English cricketer
- John Greig, the Scottish soccer player
- Keith Greig, the Australian rules football player
- Pete Greig, the Christian leader
- Samuel Greig, the Scottish-born Russian Admiral
- Tamsin Greig, the British actress
- Teresa Billington-Greig, the suffragette who created the Women's Freedom League
- Tony Greig, the English cricketer
- W. D. O. Greig, the English soccer player
- Donald Greig, the English baritone singer of the Tallis Scholars and the Orlando Consort.
Greig is the given name of several people:
- Greig Nori, the Canadian producer and musician
- Greig Pickhaver, the Australian actor and comedian
- Greig Smith, the Los Angeles City Council member
