David Arthur Gillespie (born 20 December 1957) is an Australian politician and gastroenterologist. He is a member of the National Party and has served in the House of Representatives since 2013, representing the New South Wales seat of Lyne. He held ministerial portfolios during the Turnbull and Morrison governments as Assistant Minister for Rural Health (2016–2017), Assistant Minister for Health (2017), Assistant Minister for Children and Families (2017–2018), Minister for Regional Health (2021–2022), and Minister Assisting the Minister for Trade and Investment (2021–2022).

Gillespie was born in Canberra and educated at Saint Ignatius' College, Riverview. He was a gastroenterologist for twenty years and, up until the 2013 election, was the director of physician training at Port Macquarie Base Hospital.^[1]

Gillespie contested the seat of Lyne for the first time in 2010. While he lost to the incumbent, National-turned-independent Rob Oakeshott, he achieved an 11-point swing in his favour. Following Oakeshott's retirement at the 2013 federal election, Gillespie contested the seat again and won it resoundingly. During Oakeshott's tenure, Lyne remained a comfortably safe Nationals seat in a traditional two-party matchup with Labor, so it had been expected that the seat would revert to the Nationals once Oakeshott retired.^[2]

Gillespie came under scrutiny after the High Court ruling in the Bob Day case. In April 2017, the High Court found that, under section 44(v) of the Australian Constitution, Senator Bob Day had not been eligible to hold public office because of an indirect pecuniary relationship with the Australian government. The Australian Labor Party (ALP) opposition and some community groups believed that Gillespie also had an indirect financial relationship with the federal government, in that he owned a suburban shopping complex in Port Macquarie which leased a premises to an Australia Post licensee.^[13] In July 2017, the ALP launched a High Court challenge to Gillespie's eligibility as an MP. The case was formally brought by Peter Alley, the ALP candidate for Gillespie's seat of Lyne at the 2016 federal election.^[13] Gillespie sold his interest in the shopping complex in early 2018, which would ensure his eligibility in a by-election if the court ruled that he was ineligible at the time of the 2016 election.^[14] On 21 March 2018, the seven members of the High Court determined unanimously that it did not have the jurisdiction to hear the case, unless the matter was referred to it by parliament.^[15]

Gillespie is married to Charlotte and they have three children. The family lives at Sancrox, west of Port Macquarie.^[9] He is a Roman Catholic.^[16]