States · California · San Diego County

Granite Hills, California.

A community in San Diego County, with no city government of its own. Zillow publishes no home prices for it: see San Diego County’s.

Living in Granite Hills, San Diego County, California

Granite Hills, in San Diego County, had 3,267 people in the 2020 census. Half its households earn more than $155,820 a year and half less, against $106,268 across San Diego County; 12% of its people live below the poverty line. 88% of its homes are lived in by their owners and 12% are rented. Unemployment in San Diego County was 4.9% in August 2026, and the county had 0.1% fewer jobs in 2025 than the year before. The most people in San Diego County work in schools and health care, then professional services.

People 3,267 in the 2020 census
Household income $155,820 the median, give or take $24,461 · San Diego County: $106,268
Unemployment 4.9% San Diego County, August 2026; 5.1% a year before
Homes 88% lived in by their owners; 12% rented
  • 1,148households
  • 41%of adults have a degree
  • 12%below the poverty line
  • 30 mintypical commute

What people in San Diego County work in

  • Schools, hospitals and social care22%
  • Professional and business services17%
  • Restaurants, hotels and entertainment10%
  • Manufacturing10%
  • Shops (retail)10%
  • Building trades6%

Employed residents by industry, from the Census survey. San Diego County had 1,535,067 jobs in 2025, 0.1% fewer than the year before (Bureau of Labor Statistics).

Weather through the year

Average daily high and low for each month: coldest in December, 68° and 42°; warmest in August, 89° and 65° 40° 50° 60° 70° 80° 90° J F M A M J J A 89° 65° S O N D 68° 42°
Average daily high and low for each month: coldest in December, 68° and 42°; warmest in August, 89° and 65° 40° 50° 60° 70° 80° 90° J F M A M J J A 89° 65° S O N D 68° 42°

Coldest in December, with highs near 68° and lows near 42°; warmest in August, with highs near 89° and lows near 65°. About 12 inches of rain a year, and little or no snow.

Average daily high and low, 1991–2020, at the El Cajon weather station, a mile away (NOAA).

Largest workplaces in San Diego County

  1. University of California-San DiegoUniversity or college18,717
  2. County of San DiegoSocial service agency18,392
  3. San Diego UnifiedSchool district11,195FTE
  4. Ucsd Medical CenterGeneral hospital10,244FTE
  5. National UniversityUniversity or college5,052
  6. illuminaBiotechnology research and development laboratories or services in the medical sciences4,687
  7. National UniversityColleges, universities, and professional schools4,649
  8. San Diego State UniversityUniversity or college4,229

Staff on average in 2025, as each workplace reported it to OSHA with its injury records: 2,263 workplaces with 20 or more staff, 408,395 people in all across the county; Granite Hills has one of its own. Colleges come from IPEDS (NCES, 2023–24), school districts from the Common Core of Data (NCES, 2023–24) and hospitals from their Medicare cost reports (CMS, 2023); FTE marks full-time equivalent staff. Not listed: many offices and banks, which need not report to OSHA; military bases, whose staff OPM withholds; and, in about half the states, city and county governments.

Natural hazards

  1. WildfireRelatively high
  2. EarthquakesRelatively moderate
  3. Inland floodingrelatively high in parts of Granite HillsRelatively moderate
  4. Heat wavesRelatively moderate

FEMA’s National Risk Index (December 2025) rates the risk each natural hazard poses to the people, buildings and farms in Granite Hills’ census tracts, against the rest of the country; all of them together, relatively low. It is meant for planning, not a substitute for a local risk assessment or a flood map: FEMA’s index.

From the U.S. Census Bureau’s 2020 census and its American Community Survey (2020–2024 five-year estimates), and the Bureau of Labor Statistics. A survey, so each figure has a margin of error, and figures it is not sure of are left out. More on San Diego County.