Brian Cathcart (born 26 October 1956) is an Irish-born journalist, academic and media campaigner based in the United Kingdom.
He is professor of journalism at Kingston University London and in 2011 was a founder of Hacked Off, which campaigns for a state-controlled press.
His books include Were You Still Up for Portillo? (1997), The Case of Stephen Lawrence (1999), The Fly in the Cathedral (2004) and The News From Waterloo (2015).