The Chartres public transport network extends across 34 communes.

 1. The Filibus urban network, run by Chartres Mobilité (Groupe Transdev), covers 9 communes of the greater Chartres area (Chartres, Lucé, Mainvilliers, Luisant, Lèves, Champhol, Le Coudray, Barjouville, Morancez), and offers:

* 13 regular lines,
* 2 free shuttle services (minibuses): Le Relais des Portes and La Navette
* transport for persons with reduced mobility – an on-demand transport service for disabled people requiring a wheelchair, covering the main communes of the greater Chartres area
* 20 special school transport services. The fleet comprises 64 buses and minibuses, 58 of which have been acquired since January 2007.

 2. The suburban network, run by Transports d’Eure-et-Loir, covering 25 other communes in the area:

 It comprises 21 lines and means of access to the SNCF station of the city of Chartres (possibility of connecting with the urban network and SNCF lines) and 16 direct lines to schools.

Until the end of 2006, the Communauté d’agglomération Chartres Métropole was authority in charge of the area’s urban transport system (7 communes).
In 2007, Chartres Métropole formed a union made up of the 39 communes of the Chartres area and named it the Syndicat Mixte de Transports Urbains du Bassin Chartrain. In 2011, the Syndicat Mixte de Transports Urbains du Bassin Chartrain was disbanded and the management of public transport was handed back to the Communauté d'Agglomération "Chartres Métropole" of 32 communes created on 1 January 2011. Chartres Métropole oversees the development of the public transport system, including:
- a fleet of 58 new eco-efficient buses that are accessible to all (namely persons with reduced mobility, thanks to their low steps and retractable platforms),
- a youth pass, allowing 10,000 young people under the age of 18 to travel on the network for free all year long,
- a free shuttle service in the inner city centre of Chartres,
- faster journeys in the inner city centre, thanks to dedicated bus lanes,
- new regular bus lines (line 9 services the Odyssée water park, lines 11, 12 and 13 service the activity areas)
- on-demand transport for residents in suburban communes