Usui District, Gunma
- This article is about the district in Gunma Prefecture. There is also a town with this name in Fukuoka Prefecture, see Usui, Fukuoka.
Usui (碓氷郡; -gun) is a district located in Gunma, Japan.
As of 2003, the district has an estimated population of 16,556 and a density of 94.58 persons per km². The total area is 175.05 km².
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Categories: Districts in Gunma Prefecture | Japan geography stubs