The Communauté d'agglomération du Beauvaisis is a communauté d'agglomération located in the Oise department and in the Hauts-de-France region of France.

It was created on 1 January 2017 by merger of the former Communauté d'agglomération du Beauvaisis with the Communauté de communes rurales du Beauvaisis,[1] and was expanded with 9 communes from the Communauté de communes de l'Oise Picarde in January 2018.

[3] The communauté d'agglomération consists of the following 53 communes:[4][5] The CAB is the organizing authority for mobility (AOTU).

As such, it is the owner of the bus network known as Corolis since 2010, which serves Beauvais and the agglomeration.

The agglomeration is a member of the Beauvais-Tillé Airport Mixed Union, founded on October 20, 2006, alongside the region and the department of Oise.