Sofie Merckx (born 14 November 1974) is a Belgian physician, politician and member of the Chamber of Representatives.

[2][3] Her father Kris Merckx [nl], a general practitioner and a communist, was one of the founders of the All Power to the Workers [nl] (AMADA), the precursor to the Workers' Party of Belgium (PTB), and Medics for the People [fr] (MPLP).

[4][5] She studied medicine at the University of Antwerp and the Université libre de Bruxelles.

[6] She has lived in Wallonia since then and has worked as a general practitioner at the MPLP's health centre in Marcinelle.

[12] In January 2022 she succeeded Raoul Hedebouw as the PTB's group leader in the Chamber of Representatives.