Mason County on the map of Washington 2024. Cities, roads, borders and directions in Mason County of Washington.

Mason County is located in Seattle suburban area of the state of Washington. This interesting county is named after Charles H. Mason (1830-1859), 1st Secretary of Washington Territory. The county seat of Mason County is Shelton. The county's area is about 959 square miles. Founded in 1854, today Mason County is home to 66 thousand residents. This map shows the borders of Mason County as well as neighboring counties, including major highways and natural objecsts as of 2024. Zoom in or out of the map using the plus/minus panel. Move the center of this map by dragging it. Also check out the satellite map of Mason County.