Colleary is a surname. Notable people with the surname include:
Brian Colleary, American former football coach and college athletics administrator Michael Colleary, American film producer, screenwriter and television writer Patrick Colleary, Irish Roman Catholic priest R.J. Colleary (born 1957), American television producer and writer Robert M. Colleary (1929–2012), American comedy writer and producer William B. Colleary (1890–1973), American architect Eibhlín Ní Chathailriabhaigh (Evelyn Colleary) (1910–2001), Irish language activist
See also Bernard Collaery (born 1944), Australian politician and lawyer