Leppä

{{for|a river|Leppä River}}

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
• {{ill|Juhani Leppä|fi}} (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