John McArthur may refer to:John McArthur (footballer), Australian rules player John McArthur (general) (1826–1906), Union general during the American Civil War John McArthur (1755–1840), British naval officer and author John McArthur, Australian rugby league footballer John McArthur Jr. (1823–1890), American architect J. D. McArthur, Canadian industrialist and railway builder John G. McArthur, New Zealand diplomat, see list of ambassadors of New Zealand John A. McArthur, New Zealand diplomat and eldest son of John G. McArthur, see list of ambassadors of New Zealand John H. McArthur (1934–2019), Dean Emeritus, Harvard Business School John Peter McArthur (1862–1942), Canadian politician from Alberta Frederick John McArthur, Canadian politician from Ontario