Portland Union Station is a train station in Portland, Oregon, United States, situated near the western shore of the Willamette River in Old Town Chinatown. It serves as an intermediate stop for Amtrak's Cascades and Coast Starlight routes and, along with King Street Station in Seattle, is one of two western termini of the Empire Builder. The station is a major transport hub for the Portland metropolitan area with connections to MAX Light Rail, the Portland Streetcar, and local and intercity bus services. The station building contains Wilf's Restaurant & Bar on the ground level and offices on the upper floors. It also has Amtrak's first Metropolitan Lounge on the West Coast, which is reserved for first-class sleeping car and business-class passengers.

The Coast Starlight is a long-distance passenger train operated by Amtrak on the West Coast of the United States between Seattle and Los Angeles via Portland and the San Francisco Bay Area. The train, which has operated continuously since Amtrak's formation in 1971, was the first to offer direct service between Seattle and Los Angeles. Its name is a combination of two prior Southern Pacific (SP) trains, the Coast Daylight and the Starlight.