McElwee is a surname. Notable people with the surname include:
Andrew McElwee (died 1968), British trade unionist and politicianBob McElwee (born 1935), American football officialGeorge McElwee (1879-?), Australian politicianLee McElwee (1894–1957), American baseball playerRob McElwee (born 1961), English weather forecasterRoss McElwee (born 1947), American documentary filmmakerSamuel A. McElwee (1857–1914), American slave and lawyerThomas McElwee (1957–1981), Irish Republican Army memberWilliam McElwee Miller (1892–1993), American missionary