Judith Mary Troeth AM (born 3 August 1940) is a former Australian politician who served as a Liberal member of the Australian Senate from 1993 to 2011, representing the state of Victoria. She was born in Melbourne, Victoria, and was educated at the Methodist Ladies' College, and later at the University of Melbourne, where she graduated in arts and education. She was a teacher and farmer before entering politics. In January 2009, Troeth announced she would not be contesting the next election and would retire at the end of her term in June 2011.