The 2015 1000 Guineas Stakes was a horse race held at Newmarket Racecourse on Sunday 3 May 2015. It was the 202nd running of the 1000 Guineas. The winner was Susan Magnier, Michael Tabor and Derrick Smith's Legatissimo, a British-bred bay filly trained in County Tipperary, Ireland by David Wachman and ridden by Ryan Moore. Legatissimo's victory was the first in the race for Wachman, the second for Moore and the third for the Magnier/Tabor/Smith partnership.