Angus Thomas 'Horrie' Mason (30 April 1903 – 23 August 1975) was an Australian rules footballer who played with St Kilda in the Victorian Football League (VFL) during the 1920s. Originally from Tasmania where he had been a premiership player with North Hobart Football Club, Mason debuted for St Kilda in the 1922 VFL season. He was a wingman but towards the end of his career was used as a ruckman. In 1926 Mason tied with Harold Matthews for St Kilda's Best Player award and represented Victoria at interstate football for the first of six times.