Peter Barlow

• Peter Barlow (mathematician), English writer on pure and applied mathematics
• Peter W. Barlow, English civil engineer and son of the mathematician
• Peter W. Barlow (author), engineer and author, son of Peter W. Barlow
• Peter Barlow (Coronation Street), a fictional character in the UK television soap opera Coronation Street
• Peter Barlow (footballer), former forward in the Football League
• Peter [Townsend Barlow], American jurist in New York City