Comtesse de Loir (1971 – after 1993) was a French Thoroughbred racehorse and broodmare. In her three-year racing career, she won only one important race, the Prix Saint-Alary in 1974. but was placed in numerous major events including the Critérium des Pouliches, Prix de Diane, Prix Vermeille, Prix de l'Arc de Triomphe (twice), Prix Ganay, Canadian International Stakes and Washington, D.C. International. Her performance in the 1973 Arc, when she was beaten a head by Allez France, saw her rated the best three-year-old of either sex to race in Europe that year.