Patrick Brennan may refer to:

• Patrick Brennan (Garda), Irish politician, TD 1921–1923, Assistant Commissioner of the Gárda Síochána
• (Patrick) Paudge Brennan (1922–1998), Irish Fianna Fáil TD and Senator
• Patrick Brennan, who represented Canada at the 1908 Summer Olympics at lacrosse
• Paddy Brennan, Irish jump jockey

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