William, Bill, Billy or Willie McCartney can refer to:
Bill McCartney (1940–2025), American football coach, and evangelist Billy McCartney (born 1947), Scottish footballer William McCartney (footballer), Scottish footballer (fl. 1902–1903) Willie McCartney (died 1948), Scottish football manager William John McCartney or John McCartney (1866–1933), British footballer
See also William Macartney (disambiguation) William McCartney Davidson (1872–1942), Canadian journalist, politician, and author