Furuu (古宇郡, Furuu-gun) is a district located in Shiribeshi Subprefecture, Hokkaido, Japan.
As of 2004, the district has an estimated population of 3,278 and a density of 14.25 persons per km². The total area is 230.06 km².
Coordinates: 43°09′37″N 140°27′22″E / 43.160151°N 140.456055°E / 43.160151; 140.456055
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