Peter Brennan

Peter Brennan may refer to:


 * Peter Brennan (bobsleigh) (born 1942), American Olympic bobsledder
 * Peter Brennan (producer), American television producer
 * Peter J. Brennan (1918–1996), United States Secretary of Labor under Presidents Nixon and Ford
 * Peter Brennan (Newfoundland politician) (1786–1887), Irish-born political figure in Newfoundland
 * Peter Paul Brennan (1941–2016), bishop of the Ecumenical Catholic Diocese of the Americas
 * Pete Brennan (1936–2012), American basketball player
 * Peter M. Brennan, American diplomat