Greig may refer to:

• Greig (name)

• Greig, New York, a town in Lewis County, New York
• Cape Greig in Alaska

• Greig Lake (Saskatchewan), a lake in Saskatchewan
• Greig Lake (Vancouver Island), a lake in British Columbia

• David Greig (supermarket), a former UK supermarket chain, now part of the Co-operative Group
• Greig cephalopolysyndactyly syndrome
• Greig City Academy

• Grieg (disambiguation)