William Langhorne (born July 29, 1974, in Washington, D.C.), is a race car driver sponsored by Porsche.
His best career IRL finish was in 13th position in the Delphi Indy 300 at the Chicagoland Speedway.
He is an alumnus of Burke Mountain Academy and Babson College.
(key) (Bold – Pole position awarded by qualifying time.
Italics – Pole position earned by points standings or practice time.