David Tynan O’Mahony (6 July 1936 – 10 March 2005), known professionally as Dave Allen, was an Irish comedian, satirist, and actor. He was best known for his observational comedy. Allen regularly provoked indignation by highlighting political hypocrisy and showing disdain for religious authority.

His technique and style have influenced young British comedians.

Initially becoming known in Australia in 1963 and 1964, Allen made regular television appearances in the United Kingdom from the late 1960s until the mid-1980s.

The BBC aired his Dave Allen Show from 1971 to 1986, which was also exported to several other European countries. He had a major resurgence during the late 1980s and early 1990s.

His television shows were also broadcast in the United States, Canada, Denmark, Sweden, Norway, Yugoslavia, Australia, and New Zealand.