Greg or Gregory Anderson may refer to:

• Cadillac Anderson (Gregory Wayne Anderson, born 1964), basketball player
• Greg Anderson (actor) (born 1961), Canadian actor
• Greg Anderson (dragster driver) (born 1961), NHRA pro stock drag racer
• Greg Anderson (footballer) (born 1966), Australian rules footballer
• Greg Anderson (Kentucky politician) (born 1983), youngest elected official in Kentucky
• Greg Anderson (guitarist) (born 1970), member of many doom metal and stoner metal bands, including Sunn O))), Goatsnake, Lotus Eaters
• Greg Anderson (pianist) (born 1981), American concert pianist, composer, writer
• Greg Anderson (trainer) (born 1966), baseball trainer linked to Barry Bonds and BALCO
• Gregory Anderson (screenwriter), actor, writer, film producer
• Gregory Anderson (linguist), specialist in Munda languages
• Greg Anderson (bishop), Australian Anglican Bishop of the Northern Territory