Nakauonuma District, Niigata

is a district located in Niigata Prefecture, Japan. 

Population
As of July 1, 2019, the district has a population of 9,218 and a density of 54.2 persons per km².  The area is now 170.21 km². 

Geography
The district has one village
Tsunan

History
In 1954, the town of Tōkamachi gained status after merging with three villages and later gained more land by merging surrounding villages.  There were some villages from the northside of the district merged into the city of Ojiya. 
On April 1, 2005 the town of Kawanishi, and the village of Nakasato merged with the city of Tōkamachi, leaving the district with the village of Tsunan. 

External links
十日町広域圏合併協議会 

Category:Districts in Niigata Prefecture