Hilary Hahn (born November 27, 1979 in Lexington, Virginia) is an American violinist. Beginning her studie when she was three years old at Baltimores (Baltimore) Peabody Institute, she was admitted to the Curtis Institute of Music in Philadelphia at age ten, and in 1991, made her major orchestral debut with the Baltimore Symphony Orchestra. Hahn signed her first musical recording contract at age sixteen in 1996 with Sony Music. She graduated from the Curtis Institute in May 1999 with a Bachelor of Music degree.

Hahn plays on an 1864 copy of Paganinis Cannone (Il Cannone Guarnerius) made by Vuillaume. Her main interest is in solo performance; she also performs chamber music.