 Locally, Arlington was known as the "Shingle Capital of the World", although mills in Everett and Ballard produced more shingles at the time.Agriculture and dairy farming emerged as significant industries to Arlington during the early 20th century, with farms lining the floodplain of the Stillaguamish River.A major cooperative creamery and condensery was established in Arlington during the 1910s, but later moved to Mount Vernon after World War II.