Kuusi is a Finnish surname. Notable people with the surname include:

• Janne Kuusi (born 1954), Finnish television and film director, screenwriter, producer and occasional actor

• Kim Kuusi (born 1947), Finnish composer

• Matti Kuusi (1914–1998), Finnish folklorist, paremiographer and paremiologist

• Pekka Kuusi (1917–1989), Finnish social scientist and politician