Arthur O'Neill (disambiguation)

Arthur O'Neill (1876–1914) was an Irish Unionist politician.

Arthur O'Neill or Art O'Neill may refer to:
 * Blessed Arthur O'Neilly (died 1282), Irish born Trinitarian priest who was captured by slavers in Egypt and martyred
 * Art Óg Ó Néill (died 1519), head of the O'Neill dynasty
 * Arthur O'Neill (soldier) (died 1600), Gaelic Irish landowner
 * Art MacBaron O'Neill (died 1618), Gaelic Irish landowner
 * Arturo O'Neill (1736–1814), Irish-born Spanish soldier
 * Arthur O'Neill (harpist) (1737–1816), Irish musician
 * Arthur Joseph O'Neill (1917–2013), American bishop of the Roman Catholic Church