Bart Joris Tommelein (born 4 May 1962) is a Belgian former politician for Open Vld who was minister in the Bourgeois Government.

On October 13th 2024 he announced his retirement from politics after suffering a defeat in the local elections.

He was member of the Chamber of Representatives from 2003 until 2009, where he was political group leader from 2008 to 2009.

In October 2014 Tommelein became Secretary of State for Social fraud, Privacy and the North Sea in the Michel Government.

On 4 May 2016 he succeeded Annemie Turtelboom as Vice Minister-President and Flemish Minister for Finance, Budget and Energy in the Bourgeois Government.