Simon John Birmingham is an Australian politician who has been a Senator for South Australia since 2007. A member of the Liberal Party, he served in the Morrison government as Minister for Finance from 2020 to 2022 and as Minister for Trade, Tourism and Investment from 2018 to 2020. He previously served as Minister for Education and Training in the Turnbull government from 2015 to 2018, and as a parliamentary secretary and assistant minister in the Abbott government.

The Senate is the upper house of the bicameral Parliament of Australia, the lower house being the House of Representatives. The composition and powers of the Senate are established in Chapter I of the Constitution of Australia. There are a total of 76 senators: 12 are elected from each of the six Australian states regardless of population and 2 from each of the two self-governing internal Australian territories. Senators are popularly elected under the single transferable vote system of proportional representation.