McWilliams is a surname. Notable people with the surname include:
Alfred McWilliams (1844–1928), Canadian politician from Prince Edward Island Bill McWilliams (1910–1997), American baseball player Brendan McWilliams (1944–2007), Irish meteorologist and science writer Carey McWilliams (journalist) (1905–1980), American author, editor, and lawyer Carey McWilliams (marksman) (b. 1973), American author, marksman, and skydiver Caroline McWilliams (1945–2010), American television actress; former wife of Michael Keaton Christopher 'Crip' McWilliams (1963–2008), Irish nationalist; convicted of the murder of the LVF leader Billy Wright Cynthia Kaye McWilliams (contemporary), American actress David McWilliams (American football) (contemporary), American college football coach David McWilliams (economics pundit) (b. 1966), Irish economist, commentator, and author David McWilliams (musician) (1945–2002), Northern Irish singer, songwriter, and guitarist Derek McWilliams (b. 1966), Scottish football player Diana McWilliams, American politician Douglas McWilliams (born 1951), British economist Edmund McWilliams (contemporary), American diplomat and ambassador Elsie McWilliams (1896–1985), American songwriter Eric McWilliams (b. 1950), American basketball player Fleming McWilliams (contemporary), American singer and songwriter Francis McWilliams (1926–2022), Scottish engineer and Lord Mayor of London George McWilliams (1865–1907), Australian doctor and MP Jackie McWilliams (b. 1964), Irish Olympic field hockey player Jelena McWilliams (b. 1973), U.S. banker, nominee to lead Federal Deposit Insurance Corporation (FDIC) Jeremy McWilliams (b. 1964), Irish motorcycle road racer Joe McWilliams (1904–1996), American inventor, industrial engineer, and nationalist John D. McWilliams (1891–1975), American politician from Connecticut; U.S. Representative 1943–45 Johnny McWilliams (b. 1972), American football player Julia Carolyn McWilliams, birth name of American cooking teacher, author, and television personality Julia Child Larry McWilliams (b. 1954), American baseball player Mac McWilliams (b. 2001), American football player Monica McWilliams (b. 1954), Northern Ireland academic and politician Nancy McWilliams, American psychoanalyst and writer Peter McWilliams (1949–2000), American marijuana activist and writer Rhys McWilliams (b. 1985), English ice hockey player Roland Fairbairn McWilliams (1874–1957), Canadian politician from Manitoba Rube McWilliams (1901–1984), New Zealand rugby player Shorty McWilliams (1926–1997), American football player Taj McWilliams-Franklin (b. 1970), American women's basketball player Taylor McWilliams (born 1980/1981), American real estate developer William McWilliams (1856–1929), Australian politician from Tasmania Wilson Carey McWilliams (1933–2005), American political scientist and writer
Fictional characters Lally McWilliams, a fictional character in the anime Gundam SEED DESTINY