Jean Demannez (15 February 1949 â 1 December 2021) was a Belgian politician. He served as mayor of Saint-Josse-ten-Noode in the Brussels-Capital Region from 1999 to 2012.
A member of the Socialist Party (PS), Demannez was elected schepen of the communal council of Saint-Josse-ten-Noode in January 1977. Following the death of Guy Cudell, he became mayor. He also served in the Parliament of the Brussels-Capital Region from 1989 to 2001 and was President of the .
In 2012, Demannez was defeated in the local election by Emir Kir and lost his seat as mayor of Saint-Josse-ten-Noode.
Demannez was passionate about jazz. As mayor, he founded the festival and led the initiative for the foundation of Jazz Station, located in the old .