Maltby is a census-designated place in Snohomish County, Washington. The population was 11,277 at the 2020 census. Maltby was first settled in 1887 after the arrival of the Seattle, Lake Shore and Eastern Railway, which was built between Seattle and the Canadian border. A work camp at the top of a hill in the area was originally named Earl; it later became …Maltby is a census-designated place in Snohomish County, Washington. The population was 11,277 at the 2020 census. Maltby was first settled in 1887 after the arrival of the Seattle, Lake Shore and Eastern Railway, which was built between Seattle and the Canadian border. A work camp at the top of a hill in the area was originally named Earl; it later became known as Yew. Real estate developer Robert Maltby purchased land in the area in 1890 and subdivided it into lots for sale; the local post office was renamed to Maltby in 1893. A sawmill was constructed in the settlement and operated until the early 20th century.
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