Lenzi is an Italian surname. Notable people with the surname include:
Andrea Lenzi (born 1988), Italian coxswain Aurelio Lenzi (1891–1967), Italian athlete Damiano Lenzi (born 1987), Italian ski mountaineer and cross-country skier, and soldier Diego Lenzi (born 2001), Italian boxer Eugene J. Lenzi, American racing driver Giovanni Battista Lenzi (1951–2009), Italian politician Lio Lenzi (1898–1960), Italian politician Mark Lenzi (1968–2012), American diver and diving coach Michele Lenzi (1834–1886), Italian painter Umberto Lenzi (1931–2017), Italian film director, screenwriter and novelist