San Diego County, California: Map, FIPS Code & Data
San Diego County occupies California’s southwestern corner, bordering the Pacific Ocean, Mexico, and Orange, Riverside, and Imperial counties.
County facts
Estimates: ACS 2020–2024 5-year release. Geography: Census TIGERweb 2026. Values are estimates and may have margins of error.
Interactive San Diego County map
Loading county boundary map from the U.S. Census Bureau…
County boundaries: U.S. Census Bureau TIGERweb. Base map: © OpenStreetMap contributors. Not a legal or survey map.
About San Diego County
The county encompasses coastal cities, inland valleys, mountains, and desert communities. City boundaries and ZIP codes do not always align with county boundaries.
The official county FIPS identifier is 06073. Its first two digits identify California, while the final three digits identify San Diego County within that state.
How to interpret the map and statistics
The boundary layer is from the Census Bureau’s current TIGERweb service. The figures are derived separately from the 2020–2024 American Community Survey 5-year release. Because those sources have different vintages, small changes in boundary definitions or estimated totals may occur over time.
Use the map and data to explore broad geographic patterns, not to decide legal property lines, official tax jurisdictions, eligibility to vote, or emergency service coverage. Local government and parcel records are the appropriate sources for such decisions.
Explore another county and other tools
Explore Los Angeles County or return to the California county directory. You can also use the address-to-county finder, FIPS code lookup, and county comparison tool.
Data sources and limitations
Published county estimates are not a live head count. Missing or unavailable data is shown as “Unavailable.” For definitions, accuracy notes, and source documentation, see Data & Methodology and the American Community Survey.