Naka (那珂郡 Naka-gun?) is a district of Ibaraki Prefecture, Japan.
Following the January 21, 2005 formation of the city of Naka, the district is coextensive with the village of Tōkai. As of January 1, 2005 population data, the district has an estimated population of 35,467 and a density of 946.29 persons per km². The total area is 37.48 km².
Coordinates: 36°27′38″N 140°35′17″E / 36.46056°N 140.58806°E