San Bernardino County is in Southern California, extending from Inland Empire cities through mountain communities and large areas of the Mojave Desert. San Bernardino is the county seat, while Ontario, Rancho Cucamonga, Redlands, and Victorville are other well-known places.
San Bernardino County facts
County estimates: American Community Survey (ACS) 2020–2024 5-year release. Boundary and land area: U.S. Census Bureau TIGERweb. Data may change as sources are updated.
Interactive San Bernardino County map
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Map tiles © OpenStreetMap contributors. Map boundaries are not legal property lines. Scroll-wheel zoom is disabled to make page scrolling easier.
Where is San Bernardino County?
San Bernardino County is in Southern California, extending from Inland Empire cities through mountain communities and large areas of the Mojave Desert. San Bernardino is the county seat, while Ontario, Rancho Cucamonga, Redlands, and Victorville are other well-known places.
San Bernardino County spans one of the largest land areas of any county in the contiguous United States. Its extensive deserts and mountain terrain make its overall population density very different from the density of its developed western cities.
Part of the county lies within the San Bernardino Mountains, while other areas reach toward the Nevada and Arizona borders. The interactive county outline provides broad geographic orientation, not a substitute for a surveyed parcel map or current road conditions.
San Bernardino County FIPS code and county seat
San Bernardino County’s five-digit FIPS code is 06071. Its first two digits, 06, identify California; the last three digits, 071, identify the county. The full five-digit code should be retained when joining public geographic datasets.
San Bernardino is the county seat. The county seat is the administrative center for county government. It does not necessarily represent the largest city or the location of every service. County FIPS identifiers should not be confused with ZIP Codes, city boundaries, or school districts.
Population, household income, and housing estimates
Population, median household income, median home value, median age, and poverty data on this page are drawn from the 2020–2024 American Community Survey (ACS) five-year release. These are estimates, with sampling error, rather than a real-time census. Household income and owner-occupied home value use the inflation-adjusted dollar basis of the ACS release. A countywide median is not a quote for an individual household or property.
County boundary and land-area data use the Census Bureau’s TIGERweb geography layer. Population density is calculated from the ACS population estimate and mapped land area. Geographic boundaries may have a different vintage from demographic data, so small differences between data sources are possible. Land-area figures exclude water area.
How to use the interactive county map
Use the interactive map above to inspect the county’s outline. Drag to pan and use the zoom buttons to explore the boundary in its wider region. The map is a general geographic reference: it is not a legal survey, tax-parcel map, flood map, election precinct map, or emergency-service boundary. Consult the relevant government authority before making jurisdictional decisions.
If the county boundary service cannot load, the map area displays a status message. The county seat and FIPS code remain visible without the external services.
Compare San Bernardino County with other California counties
You can explore Riverside County and Los Angeles County, or use the side-by-side county comparison tool to select two counties and compare income, population, housing, and density. Differences in medians and area do not by themselves establish which county is better for every household or business.
Frequently asked questions
Are Ontario and Victorville in the same county?
Both Ontario and Victorville are in San Bernardino County, although they are far apart and have different local characteristics. County statistics combine their populations with communities throughout the county.
What is the county FIPS code for San Bernardino County?
The five-digit code is 06071. You can search it with our County FIPS Code Lookup tool. Leading zeros, when present, are part of the identifier.
Why might the county population or map show unavailable?
The statistics and map load from external Census-related services. If the services fail or load slowly, the page shows an unavailable or retry message rather than an invented value. For more detail, visit Data and Methodology.
Sources and related county tools
Sources: U.S. Census Bureau ACS, Census TIGERweb, and Census QuickFacts. You can also explore the California county directory, ZIP Code to County Finder, and What County Am I In? tool.