McWilliam is a surname. Notable people with the surname include: Candia McWilliam (born 1955), Scottish writer Colin McWilliam (1928–1989), Scottish academic and writer F. E. McWilliam (1909–1992), British sculptor George McWilliam (1878–1968), Australian rules footballer George Roy McWilliam (1905–1977), Canadian politician James Ormiston McWilliam (1808–1862), Scottish naval surgeon, physician and writer John McWilliam (Labour politician) (1941–2009), Scottish politician Peter McWilliam (1879–1951), Scottish footballer Richard McWilliam (1953–2013), American businessman