Pacific County, Washington Pacific County, Washington Pacific County is a county located in the U.S. state of Washington. As of the 2010 census, the population was 20,920. Its county seat is South Bend, and its largest city is Raymond. The county was formed by the government of Oregon Territory in February 1851 and is named for the Pacific Ocean. Pacific County is centered on Willapa Bay, a region that provides twenty-five percent of the United States oyster harvest, although forestry, fishing, and tourism are also significant elements of the county's economy. The area that now comprises Pacific County was part of Oregon Territory
Washington State Route 510 Washington State Route 510 State Route 510 (SR 510) is a state highway in Thurston County, Washington. The long highway extends southeast from an interchange with (I-5) in Lacey to in Yelm. SR 510 roughly parallels the Nisqually River, the border between Thurston and Pierce counties, between the Fort Lewis and Nisqually Indian Community area to Yelm. The roadway was built by 1916 as a connector from Saint Clair Lake to the Northern Pacific Railway station in Yelm and was designated as Secondary State Highway 5I (SSH 5I) in 1937. The original route of SSH 5I ran from Tumwater east