Utility Trailer Manufacturing Company is an American semi-trailer truck dry van, flatbed, and refrigerated van trailer manufacturing company, with its headquarters in the City of Industry, Los Angeles County, California, and sales office in Alpharetta, Georgia and a Parts Distribution Center in Batavia, Ohio.

[4] The company's operations remained localized within the western United States until the 1960s, when it began its gradual expansion east of the Rocky Mountains.

By the mid-1990s, most of the company's business was in the East Coast as opposed to the west, although its base of operations remained in the City of Industry in Los Angeles County.

Utility's single temp and multi-temp refrigerated trailers are manufactured at the Clearfield, Utah, Atkins, Virginia, and Piedras Negras, Mexico plants.

[3] After the city of Clearfield denied them a permit to expand their operations beyond their plot of land in 1998,[7] Utility opened up the Glade Spring, Virginia, facility in 1999.