Nakauonuma (中魚沼郡, Nakauonuma-gun) is a district located in Niigata Prefecture, Japan.
As of July 1, 2019, the district has an estimated population of 9,218 with a density of 54.2 persons per km2.
The total area is 170.21 km2.
The district consists of only one village:
This Niigata Prefecture location article is a stub.