Amtrak California is a brand name used by the California Department of Transportation (Caltrans) Division of Rail for three state-supported Amtrak regional rail routes in California – the Capitol Corridor, the Pacific Surfliner, and the San Joaquins – and their associated connecting network of Amtrak Thruway transportation services.

A reporting mark is a code used to identify owners or lessees of rolling stock and other equipment used on certain rail transport networks. The code typically reflects the name or identifying number of the owner, lessee, or operator of the equipment.