Coos Bay is a great place to live, work and play surrounded by a beautiful protected bay, lush emerald forests and the mighty Pacific Ocean. Historically known as Marshfield, Coos Bay celebrates a history in shipbuilding and lumber products while serving as the regional hub for Oregon's south coast. Coos Bay proudly stands today as the largest city on the Oregon coast, with a population of 16,615, and is the medical, education, retail, and professional center for the south coast region.