Peter Gray

• Peter Gray (Australian judge), Australian federal judge
• Peter W. Gray, American lawyer, judge, and legislator from Texas
• Peter Gray (bioengineer), bioengineer in Australia
• Peter Gray (chemist), professor of physical chemistry at the University of Leeds
• Peter Gray (historian, born 1965), professor of modern Irish history at Queen's University Belfast
• Peter Gray (military historian), military historian at Birmingham University
• Peter Gray (psychologist), American psychologist and author of the introductory psychology textbook, Psychology
• Peter Gray (sailor), Irish Olympic sailor
• Peter Gray (writer), Scottish writer
• Peter S. Gray, Olympic equestrian for Bermuda and Canada
• Pete Gray, one-armed Major League baseball player
• Pete Gray (activist), Australian environmental and anti-war activist
• "Peter Gray" (song), American ballad