Leppä is a Finnish surname of Laine type literally meaning "alder". Notable people with the surname include: Aleksi Leppä (born 1994), Finnish sport shooter Henry Leppä (1947–2025), Finnish ice hockey player Jari Leppä (born 1959), Finnish politician Jouko Leppä (born 1943), Finnish Olympic weightlifter (born 1948), Finnish politician Leo Leppä (1893–1958), Finnish politician Perttu Leppä (born 1964), Finnish film director and writer Sulho Leppä (1878–1918), Finnish politician

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