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 km². The total area is 585.88 km².

• Niikappu

42°34′08″N 142°30′32″E / 42.569°N 142.509°E / 42.569; 142.509