Brosnan is a surname. Notable people with the surname include:
Chris Brosnan (born 1972), British film director, writer, and producerEddie Brosnan, Australian rugby league footballerEoin Brosnan, Irish Gaelic football playerJim Brosnan (1929-2014), American baseball playerJohn Brosnan, Australian authorPatrick Brosnan (born 1968), American mathematicianPierce Brosnan (born 1953), Irish actorSarah Brosnan, American ethologistSeán Brosnan (1916-1979), Irish barrister and politician