The City of Industry is an industrial suburb of Los Angeles in the San Gabriel Valley region of Los Angeles County. It is home to over 3,000 businesses and 67,000 jobs, and is almost entirely industrial. It was incorporated on June 18, 1957, and has become the economic hub for the San Gabriel Valley. 
In 1841, William and Nicolasa Workman, received a land grant from the governor of Alta California, Juan Bautista Alvarado. The ranch on the land, eventually grew to almost 49,000 acres. The Workman's quickly established themselves as cattle ranchers and did well financially during the Gold Rush supplying fresh beef in the gold fields. After the discovery of oil by their son on land they owned in the Montebello hills area, the Workman's grandson, Walter P. Temple, and his wife, Laura, bought the Workman House and surrounding land in 1917. This property is now known as the Workman and Temple Family Homestead Museum in the City of Industry that is free and open to the public, and in 1974, the Workman House became a historical landmark.
The City of Industry was incorporated as a charter city on June 18, 1957. The City of Industry created a general plan to guide its future development and the 1971 document remains in effect as of 2020, nearly a half century later.