Baumanis (feminine: Baumane) is a Latvian surname of German origin (from German surname Baumann). Individuals with the surname include:
Arnolds Baumanis, Latvian sport wrestler Herberts Baumanis, Latvian sprinter Jānis Baumanis (born 1992), Latvian racing driver Jānis Frīdrihs Baumanis (1834–1891), Latvian architect Kārlis Baumanis (1835–1905), Latvian classical composer Rudolfs Baumanis (1909–1998), Latvian sport shooter Valdemārs Baumanis (1905–1992), Latvian basketball player and coach