| Lạc Sơn District | |
| Settlement Type: | District |
| Native Name: | Huyện Lạc Sơn |
| Coordinates: | 20.5°N 105.5°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Northwest |
| Subdivision Type2: | Province |
| Subdivision Name2: | Hòa Bình |
| Seat Type: | Capital |
| Seat: | Vụ Bản |
| Government Type: | District |
| Parts Type: | Subdivision |
| Parts: | 1 township and 23 rural communes [1] |
| Area Total Km2: | 580 |
| Population As Of: | 2019 |
| Population Footnotes: | [2] |
| Population Total: | 136,652 |
| Population Density Km2: | auto |
| Timezone: | Indochina Time |
| Utc Offset: | +7 |
Lạc Sơn is a rural district of Hòa Bình province in the Northwest region of Vietnam. As of 2019, the district had a population of 136,652.[2] The district covers an area of 580 km2. The district capital lies at Vụ Bản.[3]
Lạc Sơn is divided into 24 commune-level sub-divisions, including the township of Vụ Bản and 23 rural communes (Ân Nghĩa, Bình Hẻm, Chí Đạo, Định Cư, Hương Nhượng, Miền Đồi, Mỹ Thành, Ngọc Lâu, Ngọc Sơn, Nhân Nghĩa, Quý Hòa, Quyết Thắng, Tân Lập, Tân Mỹ, Thượng Cốc, Tự Do, Tuân Đạo, Văn Nghĩa, Văn Sơn, Vũ Bình, Xuất Hóa, Yên Nghiệp, Yên Phú).