Dewey Decimal Numbers: California
General information about California is found in 979.4. Knowing the Dewey Decimal number for a county or a series of counties within a state makes it easier for a researcher to browse the shelves. The following chart lists California's counties in alphabetical order followed by their Dewey Decimal number.
| Alameda | 979.465 | Marin | 979.462 | San Luis Obispo | 979.478 |
| Alpine | 979.443 | Mariposa | 979.446 | San Mateo | 979.469 |
| Amador | 979.442 | Mendocino | 979.415 | Santa Barbara | 979.491 |
| Butte | 979.432 | Merced | 979.458 | Santa Clara | 979.473 |
| Calaveras | 979.444 | Modoc | 979.423 | Santa Cruz | 979.471 |
| Colusa | 979.433 | Mono | 979.448 | Shasta | 979.424 |
| Contra Costa | 979.463 | Monterey | 979.476 | Sierra | 979.436 |
| Del Norte | 979.411 | Napa | 979.419 | Siskiyou | 979.421 |
| El Dorado | 979.441 | Nevada | 979.437 | Solano | 979.452 |
| Fresno | 979.482 | Orange | 979.496 | Sonoma | 979.418 |
| Glenn | 979.431 | Placer | 979.438 | Stanislaus | 979.457 |
| Humboldt | 979.412 | Plumas | 979.429 | Sutter | 979.434 |
| Imperial | 979.499 | Riverside | 979.497 | Tehama | 979.427 |
| Inyo | 979.487 | Sacramento | 979.453 | Trinity | 979.414 |
| Kern | 979.488 | San Benito | 979.475 | Tulare | 979.486 |
| Kings | 979.485 | San Bernardino | 979.495 | Tuolumne | 979.445 |
| Lake | 979.417 | San Diego | 979.498 | Ventura | 979.492 |
| Lassen | 979.426 | San Francisco | 979.461 | Yolo | 979.451 |
| Los Angeles | 979.493 | San Joaquin | 979.455 | Yuba | 979.435 |
| Madera | 979.481 |
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Modified: 31 Jul 2008