The Carl Flesch International Violin Competition (also known as the International Competition for Violinists "Carl Flesch" and the City of London International Competition for Violin and Viola (Carl Flesch Medal)) was an international music competition for violinists, and later viola players, held between 1945 and 1992 in London. Founded in honour of the Hungarian violinist Carl Flesch, it was originally organised by the Guildhall School of Music and Drama and after 1968 formed part of the City of London Festival. Particularly in the City of London Festival era, it was regarded as among the "most prestigious" competitions for string players, and "one of the most important testing grounds for aspiring soloists up to the age of 32."
