Oki (隠岐郡, Oki-gun) is a district located in Shimane Prefecture, Japan.
As of 2003, the district has an estimated population of 24,500 and a density of 70.79 persons per km². The total area is 346.10 km².
The Oki District encompasses the Oki Islands, historically called Oki Province.
Coordinates: 36°13′30″N 133°14′42″E / 36.22500°N 133.24500°E / 36.22500; 133.24500