Merry Ruler (foaled 1958 in England) was a Thoroughbred racehorse who competed successfully in the United States. A great grandson of the very important sire, Nearco, he was raced by Harry Freylinghuysen, owner of Merrybrook Farm in Far Hills, New Jersey.Trained by Eddie Yowel, Merry Ruler competed for three years, winning major races at tracks in New Jersey and New York.