Triệu Sơn is a district of Thanh Hóa province in the North Central Coast region of Vietnam. As of 2003 the district had a population of 213,115…Triệu Sơn is a district of Thanh Hóa province in the North Central Coast region of Vietnam. As of 2003 the district had a population of 213,115. The district covers an area of 292 km². The district capital lies at Triệu Sơn.
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