Adam O'Brien (born 11 July 1993) is an English professional rugby league footballer who plays as a hooker for the Huddersfield Giants in the Super League. He has previously played for the Bradford Bulls in the Super League and the Kingstone Press Championship, spending time away from Odsal with the Dewsbury Rams in 2013. In 2017 he was sent on loan from Huddersfield to Halifax in the Kingstone Press Championship.