San Bernardino County, California
San Bernardino County is the largest county in the United States by area, stretching from the outskirts of Los Angeles to the Nevada border. Its enormous size gives the county an incredible variety of landscapes, from rugged mountains to vast desert plains.
The county seat, San Bernardino, sits at the base of the San Bernardino Mountains. Interstate 15 and Interstate 40 run through the county, making it an important transportation hub connecting Southern California with the Southwest.
Mountain communities such as Big Bear offer skiing and other outdoor activities, while the desert landscapes around Joshua Tree are popular for rock climbing, hiking, and stargazing. Stretching all the way to Nevada, San Bernardino County showcases the vast and varied geography of California.
| Category | Details |
|---|---|
| County Name | San Bernardino County |
| County Seat | San Bernardino |
| Population | Approximately 2.3 million |
| Cities, Towns, and Communities | San Bernardino, Fontana, Rialto, Ontario, Redlands, Adelanto, Barstow, Chino, Twentynine Palms |
| Interstates and Highways | I-10, I-15, I-40, I-215, State Route 18, State Route 62 |
| FIPS Code | 06-071 |
| Total Area (Land and Water) | 20,105 square miles (Land: 20,057 sq mi, Water: 48 sq mi) |
| Adjacent Counties (and Direction) | Los Angeles County (West), Riverside County (South), Orange County (Southwest), Kern County (Northwest), Inyo County (North), Mohave County, Arizona (East), Clark County, Nevada (East), La Paz County, Arizona (East) |
| Time Zone | Pacific Standard Time (PST) |
| State | California |
| Coordinates | 34.9594° N, 116.4194° W |
| Etymology | Named after the city of San Bernardino |
| Major Landmarks | San Bernardino Mountains, Joshua Tree National Park, Big Bear Lake, Mojave National Preserve, Route 66 |
PHYSICAL MAP
San Bernardino County Topographic Map
This topographic map highlights San Bernardino County’s extreme geographic diversity, with terrain ranging from high mountain ranges to vast low desert basins. The detailed contours reveal dramatic changes in elevation across this enormous county.
SATELLITE IMAGERY
San Bernardino County Satellite Map
This satellite map shows the striking contrast between desert basins, rugged mountain ranges, and developed urban areas. From the Mojave Desert to the San Bernardino Mountains, a wide variety of landscapes fills the county.
OUTLINE MAP
San Bernardino County Blank Map
This blank map outlines San Bernardino County’s enormous shape across southeastern California. The simple template highlights California’s largest county by area, stretching from the Los Angeles region toward the Nevada and Arizona borders.
California County Maps
California County Map
Ever wonder how California’s 58 counties are organized? Our California county map lays them all out, from the Pacific Coast to the vast desert regions. Explore the map to find the counties you know—and perhaps discover a few you don’t.