Arlington Municipal Airport (ICAO: KAWO, FAA LID: AWO) is a public airport located three miles (5 km) southwest of the central business district of Arlington, a city in Snohomish County, Washington, United States. It is owned and operated by the City of Arlington.

Construction of Arlington Municipal Airport was approved on February 23, 1934. The first airplane took off on June 13, 1934 and the airport was officially dedicated on July 4, 1935.

U.S. Naval Auxiliary Air Station, Arlington, Washington was established in 1940, when the United States Navy leased the airstrip from the town of Arlington to supplement training facilities at Seattle. However, no important construction took place until 1942. In that year the Navy permitted the Army to develop the field as a strategic base for medium bombers to counteract the Japanese invasion of the Aleutian Islands. Early in 1943 the Japanese threat in the Aleutians diminished and at the same time the Naval carrier program required additional training fields within reach of gunnery ranges in the Puget Sound area. By August 14, 1945 Arlington was a well-balanced station equipped to support two light carrier Air groups for either day or night operations. No major projects were pending at that time, and it was felt that none remained to be undertaken unless a significant addition was made to the functions of the station.

At the close of World War II, the U.S. military reduced funding and operations around the United States. On October 10, 1945 notification was received from the Chief of Naval Operations that Arlington would be reduced to a on December 1, 1945.

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