Matthew Arnold (1822–1888) was an English poet and cultural critic.

Matthew Arnold may also refer to:

• Matt Arnold (born 1961), British television reporter
• Matthew Arnold (director) (born 1974), American film and TV director
• Matt Arnold (baseball) (born 1980), American baseball executive
• Matthew Arnold (cricketer) (born 1988), South African cricketer

• Matthew Arnold School, Oxford, a secondary coeducational school and sixth form in Oxford.
• Matthew Arnold School, Staines-upon-Thames, a secondary coeducational school in Staines upon Thames, Surrey.

• Arnold Mathew (1852–1919), first Old Catholic bishop in the UK
• Sir Matthew Arnold Bracy Smith (1879–1959), English painter
• Matthew Arnold Thiessen (born 1980), Canadian-American musician
• Wieambilla shootings, a 2022 shooting incident in Australia, in which a police officer named Matthew Arnold was killed.

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