Yvan Mayeur (born 24 January 1960 in Etterbeek) is a former Belgian politician, former member of the Socialist Party and former mayor of Brussels from 2013 until 2017.

Nationally, Mayeur was a member of the Chamber of Representatives since 1999, and previously from 1989 to 1995.

Locally, Mayeur is elected city councillor of Brussels since 1995 and the chairperson of the CPAS/OCMW of Brussels until he took office as mayor of Brussels on 13 December 2013, succeeding Freddy Thielemans who resigned due to his age.^[1] In 2017, Majeur was forced to offer his resignation as mayor of Brussels after it had become apparent that he had stolen from Samusocial [nl], a municipal humanitarian emergency service for the homeless in Brussels. He was entitled to receive a fee for each meeting, but the number of meetings had been increased tremendously, with many of them not even having taken place.^[2]

Mayeur quit the Socialist Party on 30 June 2017, days before the party leadership would deliberate about his membership.^[3] He was succeeded as mayor of Brussels by Philippe Close (PS).