Ulmanis (feminine: Ulmane) is a Latvian surname of German origin (from German surname Ullmann). Individuals with the surname include:
- Guntis Ulmanis (born 1939), President of Latvia 1993–1999
- Gunārs Ulmanis (1938–2010), Latvian footballer
- Kārlis Ulmanis (1877–1942), First Prime Minister of Latvia
See also
- Ullmann
- Ulmann
- Ullman
- Ulman