Ōnuma District, Fukushima
Ōnuma (大沼郡 Ōnuma-gun?) is a district located in Fukushima Prefecture, Japan.
As of 2008, the district has an estimated population of 29,787 and a density of 34.2 persons per km². The total area is 870.51 km².
Coordinates: 37°26′53″N 139°32′38″E / 37.448°N 139.544°E
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