McKinstry is a surname. Notable people with the surname include:
Alexander McKinstry (1822–1879), American politician Arthur R. McKinstry (1894–1991), American Episcopal bishop Chris McKinstry (1967–2006), Canadian artificial intelligence researcher Elisha W. McKinstry (1824–1901), American jurist Henry McKinstry (1805–1871), Canadian mayor James A. McKinstry (born 1942), American football player James McKinstry (born 1979), Scottish footballer Johnny McKinstry (born 1985), Northern Irish football manager Kool-Aid McKinstry (born 2002), American football player Leo McKinstry (born 1962), Northern Irish writer and journalist Nancy McKinstry (born 1959), American businesswoman Zach McKinstry (born 1995), American baseball player
See also McKinstry's Mills Historic District, a historic district in Maryland, United States William McKinstry Farmhouse, a historic house in Massachusetts, United States William McKinstry, Jr. House, a historic house in Massachusetts, United States