Trillion (1974–1987) was a French Thoroughbred racing mare who was an Eclipse Award winner in the United States.
Raced by Nelson Bunker Hunt in partnership with long-time friend Edward L. Stephenson of Warrenton, Virginia, Trillion regularly competed against males in both Europe and the United States.
At Aqueduct Racetrack in New York City she ran third to winner Waya in the Turf Classic Invitational Stakes.
In the November 4th Washington D.C. International Stakes at Laurel Park Racecourse in Maryland, she finished fourth to winner Mac Diarmida.
Returning to the United States in the fall of 1979, Trillion finished second to male horses in four Grade 1 races at distances of 1+1⁄2 to 1+5⁄8 miles (2.4 to 2.6 km).