Coos Bay is a city located in Coos County, Oregon, United States, where the Coos River enters Coos Bay on the Pacific Ocean. The city borders the city of North Bend, and together they are often referred to as one entity called either Coos Bay-North Bend or Oregon's Bay Area. Coos Bay's population as of the 2020 census was 15,985 residents, making it the most populous city on the Oregon Coast. Oregon's Bay Area is estimated to be home to 32,308.

The Central Oregon & Pacific Railroad is a Class II railroad operating between Northern California and Eugene, Oregon, United States. It was previously a mainline owned by the Southern Pacific Railroad (SP) between Eugene and Weed, California via Medford, Oregon. SP sold the route on December 31, 1994, in favor of using its route to Eugene via Klamath Falls, Oregon and Cascade Summit.