People
* Aldo Clementi (1925–2011), Italian composer * Carlo Mazzone-Clementi (1920–2000), Italian actor and mime * Cecil Clementi (1875–1947), British colonial administrator, Governor of Hong Kong and Straits Settlements * Cecilia Clementi, Italian-American scientist * Cresswell Clementi (1918–1981), senior Royal Air Force commander * David Clementi (born 1949), British business executive, deputy governor of the Bank of England, and chairman of the BBC * Enrico Clementi (1931–2021), Italian computational chemist * Muzio Clementi (1752–1832), Italian/English composer * Rich Clementi (born 1977), American mixed martial artist * Suicide of Tyler Clementi, 2010 incident in which a college student committed suicide after his sexual encounter with another man was video-streamed over the internetOther
* Clementi, Singapore, a neighbourhood of Singapore *