All Counties › California
San Diego County, California
San Diego County runs from the Pacific through the coastal cities and inland valleys to the Anza-Borrego desert and the Mexican border at San Ysidro. Biotech in Torrey Pines, a heavy military presence, and cross-border trade drive the economy, while coastal-zone permitting, the Multiple Species Conservation Program, wildfire in the backcountry, and a chronic housing shortfall shape entitlement countywide.
Open the live San Diego County map →
San Diego County at a glance
- 3,299,000Population (2024)
- San DiegoCounty seat
- 4,211 sq miLand area
- 783 / sq miDensity
- $102,000Median household income
- $790,000Median home value
What the live San Diego County map shows
Free in your browser, nothing to download:
- City Boundaries: 18
- School Boundaries: 42
- Congressional Districts: 5
- Soils: 379
- State House Districts: 7
- State Senate Districts: 5
- Voter Precincts: 1,889
- Wetlands: 7
- Development News: 1
Cities and towns in San Diego County
Carlsbad, Chula Vista, Coronado, Del Mar, El Cajon, Encinitas, Escondido, Imperial Beach, La Mesa, Lemon Grove, National City, Oceanside, Poway, San Diego, San Marcos, Santee, Solana Beach, Vista.