Hacienda Heights is an unincorporated suburban community in Los Angeles County, California, with a population of 54,191 as of the 2020 census. It is the third largest census-designated place (CDP) in the county by area and the fourth largest by population.
The area was originally part of Rancho La Puente, operated by Mission San Gabriel during Spanish rule. Ownership later passed through John A. Rowland and William Workman, then Elias “Lucky” Baldwin, and eventually subdivided in 1913 as North Whittier Heights, known for avocado, citrus, and walnut orchards. Citrus farming declined by the 1940s, leading to suburban development. By the 1950s, Hacienda Heights became primarily a residential community. The local library opened in 1960, and the area was renamed Hacienda Heights in 1961. The community has experienced brush fires in surrounding hills, notably in 1978, 1989, and 2020.









