Stephen Jones gained preselection for the seat of Throsby in late 2009, following the resignation of former Member Jennie George. He was endorsed as the Labor candidate after the intervention of the Labor Party national executive and he gained the seat at the 2010 federal election. Jones made his First Speech in the House of Representatives on 19 October 2010. In the 43rd Parliament, Jones served as a member of the House of Representatives Standing Committee on Economics, the Standing Committee on Infrastructure and Communications. and the Joint Select Committee on Gambling Reform. Jones faced a contested pre-selection battle to retain Throsby in 2013. In the long lead up to the pre-selection, a number of potential candidates from the opposing right wing faction of the ALP were floated including Mark Hay, the son of State MP for Wollongong, Noreen Hay and former State Member for Kiama, Matt Brown. When nominations were called in May 2013, after months of delay, the only challenger to contest the pre-selection was local nurse John Rumble, son of former State MP, Terry Rumble. Jones decisively won the rank and file pre-selection ballot held on 15 June 2013 by 90 votes to 47. Stephen Jones was re-elected for a second term at the 2013 Australian federal election. On 18 October 2013, he was appointed shadow parliamentary secretary for Infrastructure and Regional Development. On 4 March 2014, Jones was promoted to Shadow Assistant Minister for Health after Melissa Parke MP stepped down due to personal and family reasons. Jones was re-elected for a third term at the 2016 Australian federal election, after the Division of Throsby had been renamed the Division of Whitlam.
Leadership on progressive political agenda
As a co-convenor of Labor's left faction in the federal parliamentary Labor Party, where as his electorate of Whitlam, is described as a socially conservative right wing seat, while remaining economically aligned with the centre left views represented by the unions. Jones has spoken in the House of Representatives on a number of issues of importance to the progressive political agenda including , , introducing a and other issues. Jones gave a on "Politics in the Next Decade: A View from Generation X" at on 2 September 2013 in which he identified three areas where Labor needs to engage in the future:
Marriage equality
On 15 November 2010, in response to a motion concerning same-sex marriage moved by Adam Bandt, Federal Member for Melbourne in the House of Representative, Jones moved, as an amendment: He articulated the political challenge: The amended motion was supported by Labor and passed in the House of Representatives, the first such motion adopted in the lower house on same-sex marriage. Following changes to the ALP National Platform in November 2011 to allow for marriage equality and a conscience vote for Labor MPs, Stephen Jones agreed to put forward a Private Member's Bill to give effect to ALP policy in the Australian Parliament. He introduced his bill to legalize same-sex marriage on 13 February 2012. The Bill was defeated in the House of Representatives on 19 September 2012.
Other issues
Jones has campaigned on a number of other issues as an MP, including during TV sports broadcasts, for , the early rollout of the National Broadband Network to the region, and renewal and Prime Minister Rudd's with Papua New Guinea.
