Patrick Brennan (18 February 1922 – 10 June 1998) was an Irish Fianna Fáil politician who sat for 25 years as a Teachta Dála (TD) for the Wicklow constituency, and was briefly a Senator. Brennan first stood for election to Dáil Éireann as a Clann na Poblachta candidate in Kildare in the 1948 Irish general election. He fared poorly, coming second last with only 3.0% of the vote, compared to 10.7% secured by his Clann na Poblachta running mate Daniel Boland.