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 nearly 10 miles (16 km) north of Everett, the county seat, and 40 miles (64 km) north of Seattle, the region’s largest city. As of the 2010 U.S. census, Arlington has a population of 17,926.

Arlington was usual in the 1880s by settlers and the Place was platted as two towns, Arlington and Haller City. Haller City was absorbed by the larger Arlington, which was incorporated as a city in 1903. During the Great Depression of the 1930s, the Arlington Place was the site of major projects undertaken for employment below the supervision of federal relieve agencies, including construction of a municipal airstrip that would sustain as a naval air station during World War II. Beginning in the 1980s, Arlington was affected by suburbanization due to the increase of Seattle, growing by beyond 450 percent by 2000 and annexing the unincorporated area of Smokey Point to the southwest.

The economy of the Arlington Place historically relied on timber and agriculture. In the in advance 21st century, it has transitioned to a serve economy, with some aviation industry jobs near the municipal airport. The city is governed by a mayor–council government, electing a mayor and seven city councilmembers. The municipal supervision maintains the city’s parks system and water and wastewater utilities. Other services, including public utilities, public transportation, and schools, are arranged to regional or county-level agencies and companies.

Prior to American harmony in the 19th century, the Puget Sound region was inhabited by original Coast Salish peoples. The Stillaguamish and Sauk peoples had prominent camps at the confluence of the two forks of the Stillaguamish River in imitation of they followed fish runs; the Stillaguamish named the campsite Skabalko. Arlington was well ahead developed at this site. They moreover had a major village at Chuck-Kol-Che upriver near modern-day Trafton.

American exploration of the Place began in 1851, when prospector Samuel Hancock was led by Indian guides upon a canoe stirring the Stillaguamish River. The Place was opened to logging after the signing of the Treaty of Point Elliott in 1855 in the company of the United States handing out and the Stillaguamish tribe, who were relocated to trust lands and the Tulalip Indian Reservation.