John Alexander Georgiadis (17 July 1939 – 5 January 2021) was a British violinist and conductor. He was twice Concert Leader with the London Symphony Orchestra during the 1960s and 70s, a member of both the ensembles London Virtuosi and the Gabrieli String Quartet as well as conductor for both the Bangkok Symphony Orchestra and the Malaysian Philharmonic Orchestra, and as Director of Orchestral Studies at the Royal Academy of Music.