In 1841, William and Nicolasa Workman, who migrated from elsewhere in Mexico with John Rowland and others, received a land grant for Rancho La Puente from the governor of Alta California, Juan Bautista Alvarado. The ranch eventually grew to almost 49,000 acres. The Workmans quickly established themselves as cattle ranchers and did well financially during the Gold Rush, supplying fresh beef to the gold fields. Following the discovery of oil by their son on land they owned in the Montebello hills, the Workmans' 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 and is a museum and heritage site in present-day City of Industry that is free and open to the public. In the 1910s, Tract 1343 was created and shows a large portion of 2017's City boundaries.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From Wikimedia Commons (11), Wikidata (3), the National Register of Historic Places (4), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.