Rainio is a surname of Finnish origin. Notable people with the surname include:
- Aino Forsten (1885-1937), born Aina Rainio, Finnish politician and educator
- Jussi Rainio (1878-1918), Finnish journalist and politician
- Selma Rainio (1873-1939), Finnish missionary
- Väinö Rainio (1896-1979), Finnish athlete
Surname listThis page lists people with the surname Rainio. If an internal link intending to refer to a specific person led you to this page, you may wish to change that link by adding the person's given name(s) to the link. Categories: