The daughter of Keith Malcolm and Eileen Mary Ralston, Judith Troeth was educated at Methodist Ladies College, Kew. She completed a Bachelor of Arts and a Diploma of Education at Melboure University.
Before entering Parliament she worked as a teacher as well as being an active partner in the family farm. She was Parliamentary Secretary to the Shadow Minister for Employment, Training and Family Services from 26 May 1994 to 11 March 1996; Parliamentary Secretary to the Minister for Primary Industries and Energy from 9 October 1997 to 21 October 1998 as well as being a member of various parliamentary committees.
Senator Judith Troeth has five children and enjoys films, theatre, reading and bushwalking.
| 1982 - 1991 | Liberal Party Branch President |
| 1985 - 1992 | Member of the Liberal Party Policy Assembly and State Rural Committees |
| 1988 - 1992 | Member of the Liberal Party Administrative Committee (Vic.) |
| 1989 - 1992 | Country Vice-President of the Liberal Pary (Vic.) |
| 1991 - 1992 | Chair of the State Strategy Committee (Vic) |
| 1 July 1993 - 10 October 1994 | Member of the Senate Legislative and General Purpose Standing Committee for Community Affairs |
| 17 August 1993 - 24 April 1996 | Member of the Senate Standing Committee for Scrutiny of Bills |
| 19 August 1993 - 9 February 1994 | Member of the Senate Estimates: A Committee |
| 7 October 1993 - 29 January 1996 | Member of the Joint Statutory: National Crime Authority |
| 21 October 1993 - 7 December 1993 | Member of the Senate Legislative and General Purpose Standing Committee for Rural and Regional Affairs |
| 8 February 1994 - 10 October 1994 | Member of the Senate Estimates: E Committee |
| 26 May 1994 - 11 March 1996 | Federal Parltiamentary Secretary to Shadow Minister for Employment, Training and Family Services |
| 10 October 1994 - 30 November 1994 | Member of the Senate Legislative and General Purpose Standing Committee for Community Affairs: References Committee |
| 10 October 1994 - 29 April 1996 | Participating member, Community Affairs: Legislation Committee |
| 10 October 1994 - 21 October 1997 | Member of the Senate Legislative and General Purpose Standing Committee for Employment, Education and Training: Legislation Committee |
| 11 October 1994 - 29 April 1996 | Participating member, Foreign Affairs, Defence and Trade: Legislation Committee |
| 12 October 1994 - 29 April 1996 | Chair of the Senate Standing Committee for Scrutiny of Bills |
| 17 October 1994 - 29 April 1996 | Rural and Regional Affairs and Transport: References Committee |
| 30 November 1994 - 9 February 1995 | Member of the Senate Select: Land Fund Bill Committee |
| 30 November 1994 - 21 October 1997 | Member of the Senate Legislative and General Purpose Standing Committee for Employment, Education and Training: References Committee |
| March 1995 - April 1995 | Member of the Parliamentary Delegation to the United States of America and Canada |
| 19 September 1995 - 30 November 1995 | Member of the Senate Select:Certain Land Fund Matters |
| 1996 - 2002 | Chair of the Federal Liberal Regional and Rural Committee |
| 9 May 1996 - 30 June 1996 | Participating member, Foreign Affairs, Defence and Trade: References Committee |
| 22 May 1996 - 26 June 1997 | Member of the Senate Select: Community Standards Relevant to the Supply of Services Utilising Electronic Technologies |
| 31 May 1996 - 10 November 1997 | Member of the Joint Standing: Migration Committee |
| 19 June 1996 - 5 December 1996 | Participating member, Economics: References Committee |
| 1 July 1996 - 21 October 1997 | Member of the Senate Legislative and General Purpose Standing Committee for Foreign Affairs, Defence and Trade: References Committee |
| 1 July 1996 - 10 November 1997 | Chairman of the Senate Foreign Affairs, Defence and Trade Legislation committee |
| 15 October 1996 - 5 December 1996 | Member of the Senate Select: Victorian Casino Inquiry |
| 13 February 1997 - 22 October 1997 | Member of the Joint Standing: Foreign Affairs, Defence and Trade |
| 9 October 1997 - 21 October 1998 | Federal Parliamentary Secretary to the Minister for Primary Industries and Energy |
| 21 October 1998 | Federal Parliamentary Secretary to the Minister for Agriculture, Fisheries and Forestry |
| June 1999 | Official visit to Singapore, Taiwan, Japan and Korea |
