The Toy Manchester Terrier breed was developed by breeding down the Manchester Terrier in size. In the United States in the 1920s the breed was called the Toy Black and Tan Terrier. The name was changed to the Toy Manchester Terrier and the American Toy Manchester Terrier Club was formed in the 1930s. The American Toy Manchester Terrier was recognised by the American Kennel Club in 1938, but by the 1950s the breed had declined and the breed club ceased to exist. Due to declining numbers of the breed, the Toy Manchester Terrier breed was re-defined as a size division of the Manchester Terrier in 1958 by the American Kennel Club, and the club name (including the two breeds as varieties) was changed to the American Manchester Terrier Club in 1958.