South San Jose Hills is an unincorporated community and census-designated place in Los Angeles County, California, United States.

South San Jose Hills is bounded by City of Industry to the south, La Puente to the west, West Covina to the north, and Walnut to the east.

Most addresses do not use South San Jose Hills as the city but rather La Puente, West Covina, or Valinda, depending on the location of the residence or business.

Parts of the area are nicknamed Happy Homes, based on the former name of the development and on the street gang that later took that name.

[16] At the 2010 census South San Jose Hills had a population of 20,551.

The racial makeup of South San Jose Hills was 9,302 (45.3%) White (4.2% Non-Hispanic White),[23] 304 (1.5%) African American, 195 (0.9%) Native American, 1,649 (8.0%) Asian, 30 (0.1%) Pacific Islander, 8,449 (41.1%) from other races, and 622 (3.0%) from two or more races.

According to the 2010 United States Census, South San Jose Hills had a median household income of $50,864, with 16.2% of the population living below the federal poverty line.

In the state legislature South San Jose Hills is located in the 24th Senate District, represented by Democrat Gloria Romero, and in the 58th Assembly District, represented by Democrat Charles M. Calderon.

Federally, South San Jose Hills is split between 32nd and 39th congressional districts, which are represented by Democrats Grace Napolitano and Gil Cisneros, respectively.