John MacArthur
John MacArthur may refer to:
- John Macarthur (wool pioneer) (1766–1834), Australian wool industry pioneer and Rum Rebel
- John McArthur, Jr. (1823-1890), American architect
- John McArthur (1826–1906), Union general during the American Civil War
- John McArthur (footballer), Australian rules player
- John Duncan McArthur (1854-1927), Canadian industrialist and railway builder
- John Seward MacArthur, inventor of the MacArthur-Forrest Process for gold cyanidation in Glasgow, Scotland in 1887
- John D. MacArthur (1897–1978), American philanthropist
- John H. McArthur (born 1935), Dean, Harvard Business School
- John F. MacArthur (born 1939), American evangelical minister and author
- John R. MacArthur (born 1956), American journalist
- John A. McArthur, New Zealand diplomat and eldest son of the late John G. McArthur, see List of Ambassadors from New Zealand
- John G. McArthur, New Zealand diplomat, see List of Ambassadors from New Zealand
- John Knox MacArthur, (1891-1918), American World War I flying ace
- General John Gordon MacArthur, a fictional murder victim from Agatha Christie's And Then There Were None