Historically known as Marshfield, Coos Bay Oregon is the largest city on the Oregon Coast and is one of the best places in the country to live work and play. Located in Coos County , Coos Bay sits along the mouth of the Coos River which is surrounded by lush forests, lakes and streams and has easy access with highway 101 running through the full length of this historic coastal town. Coos Bay continues to celebrate its history in ship building, lumber and fishing as well as offering a host of modern amenities and cultural opportunities such as the Coos Bay Museum , Music in the Park and the historic Egyptian Theater. If your a ...