Pacific County, Washington candidate for president, voting for Republican Donald Trump over Democrat Hillary Clinton. 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.
Washington State Route 510 also became (I-5) in 1968. SR 510 between I-5 and Pacific Avenue was reconstructed and widened in late 2003, with the addition of a roundabout at the Pacific Avenue intersection. The I-5 interchange will be replaced in 2020 with a diverging diamond interchange that began construction in October 2018. The interchange will be the first diverging diamond constructed in Washington and is estimated to cost $72 million, with funding provided by the state legislature's 2015 Connecting Washington package. State Route 510 Alternate, also known as the Yelm Loop, is a partially completed bypass of Yelm. The first, section opened to