Meaux comprises the entire department of Seine and Marne, suffragan of Sens until 1622, and subsequently of Paris.
The present Diocese of Meaux is made up of the greater part of the former Diocese of Meaux, a large part of the former Diocese of Sens, a part of the former Diocese of Paris, and a few parishes of the former Dioceses of Troyes, Soissons and Senlis.
A council convoked in 845 at Meaux by Charles the Bald adopted important measures for the re-establishment of discipline in the three ecclesiastical provinces of Sens, Bourges, and Reims.