Patrick Joseph O'Loughlin (29 October 1873 – 14 August 1956) was an Australian rules footballer who played for the Essendon Football Club in the Victorian Football League (VFL). In the first year of competition, 1897, he became one of the club's and league's first premiership players. O'Loughlin made his VFL debut against Geelong in round 1 of the season at Corio Oval.