Imperatrice (May 26, 1938 – August 9, 1972) was an American Thoroughbred racehorse and broodmare. She was the dam of Somethingroyal and 2nd dam of U.S. Triple Crown champion and Hall of Fame inductee, Secretariat (by Bold Ruler). A Bay mare bred in New Jersey, Imperatrice was bred by W.H. Laboyteaux. In 1947 Imperatrice was purchased by Christopher Chenery's Meadow Stud. She raced 31 times with 11 wins, 7 shows, and 2 places. Some of her winning efforts included the New England Oaks, New Rochelle Handicap, the Test Stakes, and the Fall Highweight Handicap.