Coos Bay (Coos language: Atsixiis) 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 (Coos Bay Census County Division).
Prior to Europeans first visiting the Oregon coast, Native American tribes claimed the Coos Bay region as their homeland for thousands of years. Members of the Coos, Lower Umpqua, Siuslaw and Coquille tribes lived, fished, hunted and gathered along Coos Bay and its estuaries, along rivers, and in meadows and forests. Approximately 400 years ago, British and Spanish explorers first approached the South Coast. In 1579, Sir Fran