Grays Harbor County
There are 19 US Post Offices in Grays Harbor County serving a total of 73,406 residents equating to 3,863 residents per post office. It's estimated that approximately 117,164 packages are handled across the 19 county post offices annually. Grays Harbor County is a county in the U.S. state of Washington. As of the 2010 census, the population was 72,797. The county seat is Montesano, and its largest city is Aberdeen. The county is named after a large estuarine bay near its southwestern corner. On May 7, 1792, Boston fur trader Robert Gray crossed the bar into the bay he called Bullfinch Harbor, but which later cartographers would label Chehalis Bay, and then Grays Harbor. The county, originally named Chehalis County, was formed out of Thurston County on April 14, 1854. Its name was subsequently changed to Grays Harbor County by the Washington legislature, effective June 9, 1915. The name change helped eliminate confusion resulting from the fact that the city named Chehalis was in Lewis County. Grays Harbor County comprises the Aberdeen, WA Micropolitan Statistical Area."