Gaines' Denmark (foaled 1851) was one of the most influential stallions in the development of the American Saddlebred.

Gaines' Denmark was foaled in 1851. He was a black stallion with two white hind socks, sired by Denmark and out of a mare known as the Stevenson mare.^[1] Gaines' Denmark sired four influential sons: Washington Denmark, Diamond Denmark, Star Denmark, and Sumpter Denmark. Upon the start of the American Civil War, Gaines' Denmark was put into a cavalry troop led by Confederate General John Hunt Morgan. Although Gaines' Denmark survived the war, he did not accomplish much as a sire after it. Prior to the war, he was used as a show horse. Today, he is considered one of the progenitors of the modern American Saddlebred.^[2][3]