Aso (安蘇郡, Aso-gun) was a district located in Tochigi Prefecture, Japan.
As of 2003, the district had an estimated population of 40,915 and a density of 150.59 persons per km2. The total area was 271.70 km2.
Towns and villages
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edit- ^ "総務省|令和2年版 地方財政白書|資料編 〔附属資料〕 昭和60年度以降の市町村合併の実績" [Record of Municipal Mergers Since Showa 60]. 総務省 (in Japanese). Retrieved 2024-02-28.