prefecture-level city in Henan, China
Sanmenxia (三门峡) is prefecture-level city in western Henan Province, China. Its name has also been spelled Sanmenhsia. It is on the south side of the Yellow River. In 2010, 2,234,018 people lived there.
Sanmenxia administers two districts, two county-level cities and two counties.
- Hubin District（湖滨区）
- Shanzhou District（陕州区）
- Lingbao City（灵宝市）
- Yima City（义马市）
- Lushi County（卢氏县）
- Mianchi County（渑池县）