Greg Davis may refer to:
- Greg Davis (actor) (born 1993), American actor from New Orleans, Louisiana
- Greg Davis (American football coach) (born 1951), American football coach, former offensive coordinator of the Iowa Hawkeyes
- Greg Davis (Australian footballer) (born 1955), Australian rules footballer for Footscray
- Greg Davis (basketball) (born 1982), American basketball player
- Greg Davis (bowls) (born 1988), lawn bowler from Jersey
- Greg Davis (Canadian politician), member of the Legislative Assembly of New Brunswick, Canada
- Greg Davis (ice hockey) (born 1979), Canadian ice hockey player
- Greg Davis (Mississippi politician) (born 1966), mayor of Southaven, Mississippi and U.S. congressional candidate
- Greg Davis (musician) (born 1975), American electronic musician
- Greg Davis (placekicker) (born 1965), American football placekicker, former NFL player
- Greg Davis (rugby union) (1939–1979), Australian rugby union international player and captain
- Greg Davis, American musician best known as a member of the band Blood on the Saddle
- Greg Davis, executive at investment company The Vanguard Group