Justin Morgan Had a Horse is an American children's historical novel by Marguerite Henry, illustrated by Wesley Dennis and published by Wilcox & Follett of Chicago in 1945.

[3] An edition was published by Rand McNally in 1954[4] with new copyrights by both Henry and Dennis.

[1][4] The schoolmaster, Justin Morgan, takes two colts as payment for an old debt.

The younger of the two grows into a sturdy, though small, riding horse which served as the foundation of the Morgan breed.

[5] John Smith, formerly of the NBC series Laramie, played the part of Mr. Ames.