Peter McKay or Peter MacKay may refer to:
Politicians
Peter MacKay (born 1965), Canadian politician Peter McKay (Australian politician) (born 1948), member of the Tasmanian Legislative Council
Others Peter Mackay, 4th Earl of Inchcape (born 1943) Peter Mackay (Gaelic: Pàdraig MacAoidh) (born 1979), Makar (National Poet for Scotland) Peter McKay (cricketer) (born 1994), English cricketer Peter McKay (curator), Australian art curator at Queensland Art Gallery and Gallery of Modern Art Peter McKay (footballer) (1925–2000), Scottish footballer Peter Mackay (journalist) (1926–2013) British-Southern African political activist