a passenger train route in the Pacific Northwest, operated by Amtrak in partnership with the U.S. states of Washington and Oregon.

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 Californiathe Capitol Corridor, the Pacific Surfliner, and the San Joaquinsand their associated connecting network of Amtrak Thruway transportation services.

Amtrak has used a variety of paint schemes (liveries) on its rolling stock since taking over intercity passenger rail service in the United States in 1971.

a system of through-ticketed transportation services to connect passengers with areas not served by Amtrak trains.

a federal railroad police department of Amtrak (also known as the National Railroad Passenger Corporation), the government-owned passenger train system in the United States.