Merry Go Boy (May 4, 1943 – July 7, 1967) was a highly influential Tennessee Walking Horse sire and two-time World Grand Champion.

[2] Merry Go Boy was euthanized due to arthritis on July 7, 1967, at Belfast, Tennessee.

However, Merry Go Boy won the World Grand Championship title a year afterwards, in 1947, and again in 1948.

In the 1960 Breeders' National Futurity, 24 of the 46 awards were given to sons and daughters of Merry Go Boy, although it is not known what became of these horses after they matured.

[1] Merry Go Boy is credited with popularizing his black color and fine conformation within his breed.