The 2015 New Zealand Derby was a horse race which took place at Ellerslie Racecourse on Saturday 28 February 2015. It was the 140th running of the New Zealand Derby, and it was won by Mongolian Khan. The race was billed as a match race between the highly rated Mongolian Khan and Volkstok'n'barrell, both of which had made a big impression in stringing together consecutive wins in major races throughout the summer. The eagerly anticipated clash lived up to expectations as the two exciting three-year-olds drew well clear of their rivals and fought a memorable struggle down the home straight. Having been clearly headed by Volkstok'n'barrell, Mongolian Khan fought back and proved too strong in the concluding stages, edging away to win by one length. There was a margin of more than five lengths