Kỳ Sơn is a former district of Hòa Bình province in the Northwest region of Vietnam. As of 2003 the district had a population of 34,800. The district covers an area of 202 km². The district capital lies at Kỳ Sơn.
The district was annexed by the city of Hòa Bình on December 17, 2019.Decree No. 830/NQ-UBTVQH14
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