Quill (foaled 1956 in Kentucky) was an American Thoroughbred racehorse who was the 1958 Champion Two-Year-Old Filly in the United States.
Quill was the first Champion for future U.S. and Canadian Hall of Fame trainer Lucien Laurin.
In 1971 Quill was bred to Northern Dancer's son, the 1970 English Triple Crown winner Nijinsky.
That match produced the 1972 foal Caucasus who won the Irish St Leger before being sent to compete in North America.
There, his stakes wins included the Arcadia, Manhattan, San Luis Rey and Sunset Handicaps.