|28th Mayor of Longueuil|
|Preceded by||Roger Ferland|
|Succeeded by||Jacques Olivier|
|Preceded by||Jacques Olivier|
|Succeeded by||Caroline St-Hilaire|
|Born||January 13, 1942|
|Political party||Parti municipal de Longueuil|
He first served as a city councillor in 1982, and during the 1980s was the president of the Société de transport de la Rive-Sud de Montréal (now the Réseau de transport de Longueuil).
Gladu served as the mayor of Longueuil from 1994 to 2001. The pre-2001 city of Longueuil merged with the surrounding municipalities of Boucherville, Brossard, Greenfield Park, LeMoyne, Saint-Bruno-de-Montarville, Saint-Hubert and Saint-Lambert on January 1, 2002. Jacques Olivier was elected mayor of the merged municipality.
In 2005, Boucherville, Brossard, Saint-Bruno-de-Montarville and Saint-Lambert voted to demerge from Longueuil. The demerger took effect on January 1, 2006. Following the demerger referendums, Gladu, leader of the Parti Municipal de Longueuil, won the municipal elections of Longueuil on November 6, 2005. On April 19, 2009, Claude Gladu announced that he would not seek re-election as mayor of Longueuil. He and his party instead threw their support behind former Longueuil City Council member Jacques Goyette. Goyette lost the election to Caroline St-Hilaire.