Vainio

Vainio is a Finnish surname meaning "field". Notable people with the surname include:


 * Aaro Vainio (born 1993), Finnish race driver
 * Jaakko Vainio (1892–1953), Finnish journalist and politician
 * Jouni Vainio (born 1960), Finnish Olympian sport shooter
 * Juha Vainio (1938–1990), Finnish musician
 * Martti Vainio (born 1950), Finnish long-distance runner
 * Mikko Vainio (1923–2017), Finnish politician
 * Vihtori Vainio (1890–1942), Finnish politician