About AC Transit

The Alameda-Contra Costa Transit District (AC Transit) has been in operation since 1960 and is the largest public bus-only system in California, and the 3rd largest bus-only transit agency in the United States. Based out of Oakland, California and multiple facilities throughout Alameda and Contra-Costa counties, AC Transit makes bus service available to 1.5 million East Bay residents that populate our 364 square mile service area. AC Transit operates a fleet of 626 buses and 6 facilities and is moving forward its zero emission program as funding becomes available. Currently, AC Transit connects to 9 other public and private bus systems, 22 BART stations, 7 Amtrak stations and 5 ferry terminals. In 2023, the District was honored as the Outstanding Public Transportation System of the Year by the American Public Transportation Association. AC Transit’s mission is to deliver safe, reliable, sustainable transit service that responds to the needs of our customers and community.