The Jay Granite Company

 was a miniature & full-size train manufacturing business created in 1946 by Jason E. Granite of. The business was headquartered in and exported their products to multiple countries.

The company closed in 1976 due to fierce competition from other manufacturers. Today their former shops have been converted using adaptive reuse into a Sminster restaurant. Jay's son Jason Granite Jr. later founded Jay Granite Associates Inc., a successor company.