Basa (plural Basas)
- A surname.
- According to the 2010 United States Census, Basa is the 20299th most common surname in the United States, belonging to 1310 individuals. Basa is most common among Asian/Pacific Islander (68.09%) and White (15.73%) individuals.
First-declension noun, singular only.
- Basa in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette
- a surname from Basque
- a surname from Basque, notably borne by:
According to data collected by Forebears in 2014, Basa is the 318th most common surname in the Philippines, occurring in 25,134 individuals.