Arlington is a city in northern Snohomish County, Washington, United States, part of the Seattle metropolitan area. The city lies on the Stillaguamish River in the western foothills of the Cascade Range, adjacent to the city of Marysville. It is approximately 10 miles (16 km) north of Everett, the county seat, and 40 miles (64 km) north of Seattle, the state's largest city. As of the 2020 U.S. census, Arlington had a population of 19,868; its estimated population is 20,075 as of 2021.
Olympic Avenue in downtown Arlington
Storefronts on Olympic Avenue in downtown Arlington were built during the city's early history and have since been preserved
Aerial view of downtown Arlington and the Stillaguamish River floodplain
Arlington's city hall, located on Olympic Avenue in downtown
Snohomish County, Washington
Snohomish County is a county located in the U.S. state of Washington. With a population of 827,957 as of the 2020 census, it is the third-most populous county in Washington, after nearby King and Pierce counties, and the 72nd-most populous in the United States. The county seat and largest city is Everett. The county forms part of the Seattle metropolitan area, which also includes King and Pierce counties to the south.
Aerial view of the Snohomish River delta, including portions of Everett, Lake Stevens, and Marysville
Canoes with settlers and Native Americans at Mukilteo Beach, c. 1861–62
Snoqualmie Hall, a building shared by Edmonds College and Central Washington University, 2007