The 2015 Vattenfall Cyclassics was a one-day classic cycling race that took place in Northern Germany on 23 August. It was the 20th edition of the Vattenfall Cyclassics one-day cycling race, and was the twenty-third race of the 2015 UCI World Tour. The race started in Kiel and ended in Hamburg. The course was mainly flat; the race generally suits sprinters, such as the defending champion, Alexander Kristoff (Team Katusha).