Arditi is a surname. Notable people with the surname include:
Luigi Arditi (1822–1903), Italian violinist, composer and conductor
Binyamin Arditi (1897–1981), Austrian/Bulgarian-Israeli politician, author
Esther Arditi (1937–2003), Israeli soldier, the only woman recipient of the Medal of Distinguished Service
Pierre Arditi (born 1944), French actor
Dani Arditi (born 1951), head of the Israeli National Security Council 2007-2009