South Diamond Bar is an

unincorporated area An unincorporated area is a parcel of land that is not governed by a local general-purpose municipal corporation. (At p. 178.) They may be governed or serviced by an encompassing unit (such as a county) or another branch of the state (such as th ...

in eastern

Los Angeles County Los Angeles County, officially the County of Los Angeles and sometimes abbreviated as LA County, is the most populous county in the United States, with 9,663,345 residents estimated in 2023. Its population is greater than that of 40 individua ...

, which has been designated an agricultural zone, according to the Los Angeles County Regional Planning Department. Though unincorporated, the land is owned by the

City of Industry The City of Industry is a city in the San Gabriel Valley, in eastern Los Angeles County, California, United States. The city is almost entirely industrial, containing over 3,000 businesses employing 67,000 people, with only 264 residents as of ...

. It is commonly called the Ranch. There is no commercial or residential land in the area. As such, the population is zero. There is a camping ground in the area called the Firestone Boy Scout Reservation, which is available to nonprofit youth groups. The street address of the camping ground is labeled as Brea, despite it not being located within the city of Brea, and only a small portion being located in Orange County. The area is bordered by

Diamond Bar Diamond Bar is a city in eastern Los Angeles County, California, United States. The 2020 census listed a population of 55,072. It is one of a few cities in California with a majority Asian population (59.24% as of 2020). It is named after the ...

to the north and

Chino Hills The Chino Hills are a mountain range on the border of Orange, Los Angeles, and San Bernardino counties, California, with a small portion in Riverside County. Chino Hills State Park preserves open space and habitat in them. Geography The Chin ...

to the east.

Geography

South Diamond Bar is located at (33.95694, -117.82228). The CA-57 Freeway runs along the western edge of the area.

References

{{reflist Unincorporated communities in Los Angeles County, California