The 2015 Diamond League was the sixth season of the annual series of outdoor track and field meetings, organised by the International Association of Athletics Federations (IAAF). It consisted of fourteen one-day meetings, starting on 15 May in Doha, Qatar, and ending on 11 September in Brussels, Belgium. Other events were held in Shanghai, Eugene, Rome, Birmingham, Oslo, New York City, Paris, Lausanne, Fontvieille, Monaco, London, Stockholm, and Zürich. All previous venues remained on the tour, with the exception that London returned to host the second meeting in the United Kingdom, having been replaced by Glasgow during the 2014 IAAF Diamond League.