P. J. Gallagher is an Irish stand-up comedian and actor, perhaps better known from his television show Naked Camera.

He is an alumnus of St Paul's College, Raheny. In June 2013, Gallagher married Elaine Stewart who was his long-term girlfriend, they are believed to have separated in 2016. He is also friends with fellow comedian Jason Byrne, and he has worked on BBC's The I Hate Show. Gallagher is also a motorbike racer. He has revealed he has reactive arthritis.