Saru (沙流郡, Saru-gun, Ainu: Sar) is a district located in Hidaka Subprefecture, Hokkaido, Japan.
As of 2004, the district has an estimated population of 21,190 and a density of 12.21 persons per km. The total area is 1,735.83 km.
42°31′58″N 142°06′05″E / 42.5327055°N 142.101514°E / 42.5327055; 142.101514 (average of town offices)
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