Joseph Ignatius Langtry (2 September 1880 – 30 April 1951) was an Australian politician. Born in Kyabram, Victoria, he received a primary education before becoming a teamster. He moved to Barellan in New South Wales and became a wheatfarmer and publican. In 1940, he was the Labor candidate for the Australian House of Representatives seat of Riverina; he was successful in this, defeating Country Party member Horace Nock.