Niikappu (新冠郡, Niikappu-gun) is a district located in Hidaka Subprefecture, Hokkaido, Japan.
As of 2010, the district has an estimated population of 5,862 and a density of 10.0 persons per km. The total area is 585.88 km.
42°34′08″N 142°30′32″E / 42.569°N 142.509°E / 42.569; 142.509
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