Upatnieks is a surname. Notable people with the surname include:
- Gunars Upatnieks (born 1983), Latvian double-bass player
- Juris Upatnieks (born 1936), Latvian-American physicist
- Rolands Upatnieks (1932–1994), Latvian luger
Upatnieks is a surname. Notable people with the surname include: