Rosario, Washington

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Coordinates: 48°38′55″N 122°52′42″W / 48.6487183°N 122.8782047°W / 48.6487183; -122.8782047 Rosario is an unincorporated community in San Juan County, in the U.S. state of Washington.[1]


A post office called Rosario was established in 1906, and remained in operation until 1954.[2] The community takes its name from nearby Rosario Strait.[3]


  1. ^ U.S. Geological Survey Geographic Names Information System: Rosario, Washington
  2. ^ "Post Offices". Jim Forte Postal History. Retrieved 22 August 2016. 
  3. ^ Meany, Edmond S. (1923). Origin of Washington geographic names. Seattle: University of Washington Press. p. 248.