Patrick O'Neill or Patrick O'Neil may refer to:

• Patrick O'Neill, 1st Count of Tyrone, 17th century soldier and 1st Count of Tyrone
• Patrick O'Neill (politician) (1875–1938), Irish politician and hotel proprietor
• Patrick O'Neill (psychologist) (1942–2021), Canadian psychologist
• Patrick Geoffrey O'Neill (1924–2012), British academic and writer
• Patrick O'Neill (handballer) (born 1956), American handball player
• Patrick O'Neil (1942–2019), American computer scientist
• Patrick O'Neil (footballer) (born 1992), Scottish footballer
• J. Patrick O'Neill (born 1971), Rhode Island state representative
• Patrick O'Neill (bishop), Irish Roman Catholic bishop
• Patrick O'Neill (activist), American Catholic peace activist, one of the Kings Bay Plowshares Seven

• All pages with titles containing Patrick O'Neill
• Pat O'Neill (disambiguation)
• Patrick O'Neal (disambiguation)

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