Peter James O'Mahonyis an Irish rugby union player who plays as a flanker for United Rugby Championship club Munster and the Ireland national team.
During his career, O'Mahony has captained Presentation Brothers College, Ireland U18, Ireland U20, Munster, Ireland and the British & Irish Lions. He plays primarily as a flanker, but can also play at number 8, and represents Cork Constitution in the All-Ireland League.