David Arthur Gillespie 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).

The Division of Lyne is an Australian electoral division in the state of New South Wales.