Mei Li Vos (born 31 March 1970) is a Dutch politician, former trade unionist and editorialist. A member of the Labour Party (PvdA), she was a member of the House of Representatives from 1 March 2007 to 17 June 2010 and again from 20 September 2012 until 23 March 2017. She has been a member of the Senate since 11 June 2019, serving as parliamentary leader of the PvdA group until 2023, as First Vice-President of the Senate from 2023 until 2025, and as President of the Senate since 2025.