Mariëtte Patijn (born 29 December 1966) is a Dutch politician representing the Labour Party (PvdA) who was elected to the House of Representatives in the 2023 Dutch general election.
After not completing several studies, she started her career as a secretary for the Federation of Dutch Trade Unions (FNV).
She rose to the rank of union leader in her twenties, conducting negotiations for collective bargaining agreements, and later became the federation's vice chair and terms of employment coordinator.
Patijn left the FNV in 2018 and subsequently started working for the Netherlands Labour Authority.
She has told that she found the union's involvement too broad and that she preferred to focus on labour and wages.