Duncan MacArthur may refer to:

• Duncan MacArthur (Manitoba politician) (1840–1907), member of the Legislative Assembly of Manitoba
• Duncan MacArthur (Ontario politician) (1911–1914), member of the Legislative Assembly of Ontario

See also

• Duncan McArthur (1772–1839), military officer and politician from Ohio
• Duncan McArthur (Canadian politician) (1885 –1943), member of the Legislative Assembly of Ontario

Topics referred to by the same term

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