Peter Ryan may refer to:
Sports Peter Ryan (cricketer) (born 1951), Australian cricketer Peter Ryan (footballer, born 1891) (1891–1982), Australian rules footballer for St Kilda Peter Ryan (footballer, born 1936) (1936–2021), Australian rules footballer for South Melbourne and police superintendent Peter Ryan (footballer, born 1948), Australian rules footballer for Hawthorn Peter Ryan (rugby league, Newtown) (1933–2025), Australian rugby league footballer active 1953–1962 Peter Ryan (rugby union, born 1930) (1930–2026), English rugby union player Peter Ryan (rugby union, born 1940), Australian rugby union player Peter Ryan (rugby, born 1971), Australian rugby league footballer Peter Ryan (racing driver) (1940–1962), Formula One race driver from Canada Peter Ryan (basketball), player in the Canada national men's basketball team in the 1970s
Other Peter J. Ryan (1841–1908), Union Army soldier and Medal of Honor recipient Peter John Ryan (1925–2002), Australian surgeon Peter Ryan (columnist) (1923–2015), Australian newspaper columnist and author Peter Ryan (journalist) (1960–2025), Australian journalist Peter Ryan (police officer) (1944–2025), Commissioner of the New South Wales Police from 1996 until 2002 Peter Ryan (politician) (born 1950), former leader of the National Party of Australia in Victoria Peter Ryan (singer), contestant on the first season of Australian Idol Peter Ryan (computer scientist), British computer scientist who devised Prêt à Voter