Patrick Cahill or Pat Cahill may refer to:
Patrick Cahill (Sinn Féin politician) (1884–1946), Irish politician and newspaper editor Patrick Cahill (Irish Nationalist) (died 1886), Irish newspaper editor and political activist Patrick Cahill (Fine Gael politician), Irish Lord Mayor of Dublin from 1947 to 1948 as a member of Fine Gael Patrick Cahill (Australian hunter) (c. 1863–1923), Australian buffalo hunter and protector of Aborigines in the Northern Territory Pat Cahill, British comedian Pat Cahill (footballer) (1919–1966), Australian rules footballer