# California statistical areas

The U.S. State of California currently has 42 statistical areas that have been delineated by the federal Office of Management and Budget (OMB).
On July 21, 2023, the OMB delineated seven combined statistical areas, 25 metropolitan statistical areas, and ten micropolitan statistical areas in California. As of 2023, the largest of these in the state is the Los Angeles-Long Beach, CA CSA, encompassing greater Los Angeles.

## Background

The Office of Management and Budget (OMB) has designated more than 1,000 statistical areas for the United States and Puerto Rico. These statistical areas are important geographic delineations of population clusters used by the OMB, the United States Census Bureau, planning organizations, and federal, state, and local government entities.
The OMB defines a core-based statistical area (commonly referred to as a CBSA) as the county or counties (or county-equivalents) surrounding at least one densely-settled core of at least 10,000 population, "plus adjacent counties having a high degree of social and economic integration with the core as measured through commuting ties with the counties containing the core". The OMB further divides core-based statistical areas based on population into metropolitan statistical areas (MSAs) for those with at least 50,000 and micropolitan statistical areas (μSAs) for those with 10,000 to 49,999 people.
The OMB defines a combined statistical area (CSA) as two or more adjacent core-based statistical areas where the employment interchange rate (% commuting from A to B plus % commuting from B to A) is at least 15%. The primary statistical areas (PSAs) include all combined statistical areas and any core-based statistical area that is not a constituent of a combined statistical area.

## Table

The 42 United States statistical areas and 58 counties of the State of California :
| Combined statistical area | 2023 population (est.) | Core-based statistical area | 2023 population (est.) | County | 2023 population (est.) | Metropolitan division | 2023 population (est.) |
| Los Angeles–Long Beach, CA CSA | 18,316,743 | Los Angeles–Long Beach–Anaheim, CA MSA | 12,799,100 | Los Angeles County, California | 9,663,345 | Los Angeles-Long Beach-Glendale, CA MD | 9,663,345 |
| Los Angeles–Long Beach, CA CSA | 18,316,743 | Los Angeles–Long Beach–Anaheim, CA MSA | 12,799,100 | Orange County, California | 3,135,755 | Anaheim-Santa Ana-Irvine, CA MD | 3,135,755 |
| Los Angeles–Long Beach, CA CSA | 18,316,743 | Riverside–San Bernardino–Ontario, CA MSA | 4,688,053 | Riverside County, California | 2,492,442 | none | none |
| Los Angeles–Long Beach, CA CSA | 18,316,743 | Riverside–San Bernardino–Ontario, CA MSA | 4,688,053 | San Bernardino County, California | 2,195,611 | none | none |
| Los Angeles–Long Beach, CA CSA | 18,316,743 | Oxnard-Thousand Oaks-Ventura, CA MSA | 829,590 | Ventura County, California | 829,590 | none | none |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | San Francisco–Oakland–Fremont, CA MSA | 4,566,961 | Alameda County, California | 1,622,188 | Oakland-Fremont-Berkeley, CA MD | 2,777,213 |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | San Francisco–Oakland–Fremont, CA MSA | 4,566,961 | Contra Costa County, California | 1,155,025 | Oakland-Fremont-Berkeley, CA MD | 2,777,213 |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | San Francisco–Oakland–Fremont, CA MSA | 4,566,961 | San Francisco County, California | 808,988 | San Francisco-San Mateo-Redwood City, CA MD | 1,535,341 |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | San Francisco–Oakland–Fremont, CA MSA | 4,566,961 | San Mateo County, California | 726,353 | San Francisco-San Mateo-Redwood City, CA MD | 1,535,341 |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | San Francisco–Oakland–Fremont, CA MSA | 4,566,961 | Marin County, California | 254,407 | San Rafael, CA MD | 254,407 |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | San Jose-Sunnyvale-Santa Clara, CA MSA | 1,945,767 | Santa Clara County, California | 1,877,592 | none | none |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | San Jose-Sunnyvale-Santa Clara, CA MSA | 1,945,767 | San Benito County, California | 68,175 | none | none |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | Stockton, CA MSA | 800,965 | San Joaquin County, California | 800,965 | none | none |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | Modesto, CA MSA | 551,430 | Stanislaus County, California | 551,430 | none | none |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | Vallejo, CA MSA | 449,218 | Solano County, California | 449,218 | none | none |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | Merced, CA MSA | 291,920 | Merced County, California | 291,920 | none | none |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | Santa Cruz-Watsonville, CA MSA | 261,547 | Santa Cruz County, California | 261,547 | none | none |
| San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | Napa, CA MSA | 133,216 | Napa County, California | 133,216 | none | none |
| none | none | San Diego-Chula Vista-Carlsbad, CA MSA | 3,269,973 | San Diego County, California | 3,269,973 | none | none |
| Sacramento-Roseville, CA CSA | 2,706,315 | Sacramento-Roseville-Folsom, CA MSA | 2,420,608 | Sacramento County, California | 1,584,288 | none | none |
| Sacramento-Roseville, CA CSA | 2,706,315 | Sacramento-Roseville-Folsom, CA MSA | 2,420,608 | Placer County, California | 423,561 | none | none |
| Sacramento-Roseville, CA CSA | 2,706,315 | Sacramento-Roseville-Folsom, CA MSA | 2,420,608 | Yolo County, California | 220,544 | none | none |
| Sacramento-Roseville, CA CSA | 2,706,315 | Sacramento-Roseville-Folsom, CA MSA | 2,420,608 | El Dorado County, California | 192,215 | none | none |
| Sacramento-Roseville, CA CSA | 2,706,315 | Yuba City, CA MSA | 183,670 | Sutter County, California | 97,948 | none | none |
| Sacramento-Roseville, CA CSA | 2,706,315 | Yuba City, CA MSA | 183,670 | Yuba County, California | 85,722 | none | none |
| Sacramento-Roseville, CA CSA | 2,706,315 | Truckee-Grass Valley, CA μSA | 102,037 | Nevada County, California | 102,037 | none | none |
| Fresno-Hanford–Corcoran, CA CSA | 1,332,702 | Fresno, CA MSA | 1,180,020 | Fresno County, California | 1,017,162 | none | none |
| Fresno-Hanford–Corcoran, CA CSA | 1,332,702 | Fresno, CA MSA | 1,180,020 | Madera County, California | 162,858 | none | none |
| Fresno-Hanford–Corcoran, CA CSA | 1,332,702 | Hanford-Corcoran, CA MSA | 152,682 | Kings County, California | 152,682 | none | none |
| none | none | Bakersfield-Delano, CA MSA | 913,820 | Kern County, California | 913,820 | none | none |
| none | none | Santa Rosa-Petaluma, CA MSA | 481,812 | Sonoma County, California | 481,812 | none | none |
| none | none | Visalia, CA MSA | 479,468 | Tulare County, California | 479,468 | none | none |
| none | none | Santa Maria-Santa Barbara, CA MSA | 441,257 | Santa Barbara County, California | 441,257 | none | none |
| none | none | Salinas, CA MSA | 430,723 | Monterey County, California | 430,723 | none | none |
| none | none | San Luis Obispo-Paso Robles, CA MSA | 281,639 | San Luis Obispo County, California | 281,639 | none | none |
| Redding-Red Bluff, CA CSA | 245,262 | Redding, CA MSA | 180,366 | Shasta County, California | 180,366 | none | none |
| Redding-Red Bluff, CA CSA | 245,262 | Red Bluff, CA μSA | 64,896 | Tehama County, California | 64,896 | none | none |
| none | none | Chico, CA MSA | 207,172 | Butte County, California | 207,172 | none | none |
| none | none | El Centro, CA MSA | 179,057 | Imperial County, California | 179,057 | none | none |
| none | none | Eureka-Arcata, CA μSA | 133,985 | Humboldt County, California | 133,985 | none | none |
| none | none | Ukiah, CA μSA | 89,108 | Mendocino County, California | 89,108 | none | none |
| none | none | Clearlake, CA μSA | 67,878 | Lake County, California | 67,878 | none | none |
| none | none | Sonora, CA μSA | 54,204 | Tuolumne County, California | 54,204 | none | none |
| none | none | Susanville, CA μSA | 28,861 | Lassen County, California | 28,861 | none | none |
| Brookings-Crescent City, OR-CA CSA | 49,885 26,589 (CA) | Crescent City, CA μSA | 26,589 | Del Norte County, California | 26,589 | none | none |
| Brookings-Crescent City, OR-CA CSA | 49,885 26,589 (CA) | Brookings, OR μSA | 23,296 | Curry County, Oregon | 22,364 | none | none |
| none | none | Bishop, CA μSA | 18,527 | Inyo County, California | 18,527 | none | none |
| Reno-Carson City-Gardnerville Ranchos, NV-CA CSA | 699,307 1,141 (CA) | Reno, NV MSA | 564,782 | Washoe County, Nevada | 498,022 | none | none |
| Reno-Carson City-Gardnerville Ranchos, NV-CA CSA | 699,307 1,141 (CA) | Reno, NV MSA | 564,782 | Lyon County, Nevada | 62,583 | none | none |
| Reno-Carson City-Gardnerville Ranchos, NV-CA CSA | 699,307 1,141 (CA) | Reno, NV MSA | 564,782 | Storey County, Nevada | 4,177 | none | none |
| Reno-Carson City-Gardnerville Ranchos, NV-CA CSA | 699,307 1,141 (CA) | Carson City, NV MSA | 58,036 | Carson City, Nevada | 58,036 | none | none |
| Reno-Carson City-Gardnerville Ranchos, NV-CA CSA | 699,307 1,141 (CA) | Gardnerville Ranchos, NV-CA μSA | 50,686 1,141 (CA) | Douglas County, Nevada | 49,545 | none | none |
| Reno-Carson City-Gardnerville Ranchos, NV-CA CSA | 699,307 1,141 (CA) | Gardnerville Ranchos, NV-CA μSA | 50,686 1,141 (CA) | Alpine County, California | 1,141 | none | none |
| Reno-Carson City-Gardnerville Ranchos, NV-CA CSA | 699,307 1,141 (CA) | Fallon, NV μSA | 25,803 | Churchill County, Nevada | 25,803 | none | none |
| none | none | none | none | Calaveras County, California | 46,565 | none | none |
| none | none | none | none | Siskiyou County, California | 42,905 | none | none |
| none | none | none | none | Amador County, California | 41,811 | none | none |
| none | none | none | none | Glenn County, California | 28,129 | none | none |
| none | none | none | none | Colusa County, California | 22,037 | none | none |
| none | none | none | none | Plumas County, California | 19,131 | none | none |
| none | none | none | none | Mariposa County, California | 16,919 | none | none |
| none | none | none | none | Trinity County, California | 15,670 | none | none |
| none | none | none | none | Mono County, California | 13,066 | none | none |
| none | none | none | none | Modoc County, California | 8,500 | none | none |
| none | none | none | none | Sierra County, California | 3,200 | none | none |
| State of California | State of California | State of California | State of California | State of California | 38,965,193 | none | none |

## Core-based statistical areas

The following table provides the in-state population ranking of each CBSA along with its rate of population change over time.
The 35 core-based statistical areas of the State of California :
| 2023 rank | Core-based statistical area | Population | Population | Population | Population | Population |
| 2023 rank | Core-based statistical area | 2023 estimate | Change | 2020 Census | Change | 2010 Census |
| 1 | Los Angeles-Long Beach-Anaheim, CA MSA | 12,799,100 | −3.04% | 13,200,998 | +2.90% | 12,828,837 |
| 2 | Riverside-San Bernardino-Ontario, CA MSA | 4,688,053 | +1.92% | 4,599,839 | +8.88% | 4,224,851 |
| 3 | San Francisco-Oakland-Fremont, CA MSA | 4,566,961 | −3.83% | 4,749,008 | +9.54% | 4,335,391 |
| 4 | San Diego-Chula Vista-Carlsbad, CA MSA | 3,269,973 | −0.87% | 3,298,634 | +6.57% | 3,095,313 |
| 5 | Sacramento-Roseville-Folsom, CA MSA | 2,420,608 | +0.97% | 2,397,382 | +11.55% | 2,149,127 |
| 6 | San Jose-Sunnyvale-Santa Clara, CA MSA | 1,945,767 | −2.73% | 2,000,468 | +8.90% | 1,836,911 |
| 7 | Fresno, CA MSA | 1,180,020 | +1.30% | 1,164,909 | +7.73% | 1,081,315 |
| 8 | Bakersfield-Delano, CA MSA | 913,820 | +0.50% | 909,235 | +8.29% | 839,631 |
| 9 | Oxnard-Thousand Oaks-Ventura, CA MSA | 829,590 | −1.69% | 843,843 | +2.49% | 823,318 |
| 10 | Stockton, CA MSA | 800,965 | +2.79% | 779,233 | +13.71% | 685,306 |
| 11 | Modesto, CA MSA | 551,430 | −0.26% | 552,878 | +7.47% | 514,453 |
| 12 | Santa Rosa-Petaluma, CA MSA | 481,812 | −1.44% | 488,863 | +1.03% | 483,878 |
| 13 | Visalia, CA MSA | 479,468 | +1.34% | 473,117 | +7.00% | 442,179 |
| 14 | Vallejo, CA MSA | 449,218 | −0.94% | 453,491 | +9.71% | 413,344 |
| 15 | Santa Maria-Santa Barbara, CA MSA | 441,257 | −1.56% | 448,229 | +5.74% | 423,895 |
| 16 | Salinas, CA MSA | 430,723 | −1.89% | 439,035 | +5.78% | 415,057 |
| 17 | Merced, CA MSA | 291,920 | +3.81% | 281,202 | +9.93% | 255,793 |
| 18 | San Luis Obispo-Paso Robles, CA MSA | 281,639 | −0.28% | 282,424 | +4.74% | 269,637 |
| 19 | Santa Cruz-Watsonville, CA MSA | 261,547 | −3.44% | 270,861 | +3.23% | 262,382 |
| 20 | Chico, CA MSA | 207,172 | −2.11% | 211,632 | −3.80% | 220,000 |
| 21 | Yuba City, CA MSA | 183,670 | +1.36% | 181,208 | +8.58% | 166,892 |
| 22 | Redding, CA MSA | 180,366 | −0.98% | 182,155 | +2.78% | 177,223 |
| 23 | El Centro, CA MSA | 179,057 | −0.36% | 179,702 | +2.96% | 174,528 |
| 24 | Hanford-Corcoran, CA MSA | 152,682 | +0.13% | 152,486 | −0.32% | 152,982 |
| 25 | Eureka-Arcata, CA μSA | 133,985 | −1.82% | 136,463 | +1.37% | 134,623 |
| 26 | Napa, CA MSA | 133,216 | −3.48% | 138,019 | +1.12% | 136,484 |
| 27 | Truckee-Grass Valley, CA μSA | 102,037 | −0.20% | 102,241 | +3.52% | 98,764 |
| 28 | Ukiah, CA μSA | 89,108 | −2.72% | 91,601 | +4.28% | 87,841 |
| 29 | Clearlake, CA μSA | 67,878 | −0.42% | 68,163 | +5.41% | 64,665 |
| 30 | Red Bluff, CA μSA | 64,896 | −1.42% | 65,829 | +3.73% | 63,463 |
| 31 | Sonora, CA μSA | 54,204 | −2.55% | 55,620 | +0.46% | 55,365 |
| 32 | Susanville, CA μSA | 28,861 | −11.82% | 32,730 | −6.20% | 34,895 |
| 33 | Crescent City, CA μSA | 26,589 | −4.16% | 27,743 | −3.03% | 28,610 |
| 34 | Bishop, CA μSA | 18,527 | −2.57% | 19,016 | +2.53% | 18,546 |
| 35 | Gardnerville Ranchos, NV-CA μSA (CA) | 1,141 | −5.23% | 1,204 | +2.47% | 1,175 |
| | Gardnerville Ranchos, NV-CA μSA | 50,686 | −0.01% | 50,692 | +5.23% | 48,172 |

## Combined statistical areas

The following table provides the in-state population ranking of each CSA along with its rate of population change over time.
The seven combined statistical areas of the State of California :
| 2023 rank | Combined statistical area | Population | Population | Population | Population | Population |
| 2023 rank | Combined statistical area | 2023 estimate | Change | 2020 Census | Change | 2010 Census |
| 1 | Los Angeles-Long Beach, CA CSA | 18,316,743 | −1.76% | 18,644,680 | +4.29% | 17,877,006 |
| 2 | San Jose-San Francisco-Oakland, CA CSA | 9,001,024 | −2.43% | 9,225,160 | +9.30% | 8,440,064 |
| 3 | Sacramento-Roseville, CA CSA | 2,706,315 | +0.95% | 2,680,831 | +11.02% | 2,414,783 |
| 4 | Fresno-Hanford-Corcoran, CA CSA | 1,332,702 | +1.16% | 1,317,395 | +6.73% | 1,234,297 |
| 5 | Redding-Red Bluff, CA CSA | 245,262 | −1.10% | 247,984 | +3.03% | 240,686 |
| 6 | Brookings-Crescent City, OR-CA CSA (CA) | 26,589 | −4.16% | 27,743 | −3.03% | 28,610 |
| 7 | Reno-Carson City-Gardnerville Ranchos, NV-CA CSA (CA) | 1,141 | −5.23% | 1,204 | +2.47% | 1,175 |
| | Brookings-Crescent City, OR-CA CSA | 49,885 | −2.55% | 51,189 | +0.42% | 50,974 |
| | Reno-Carson City-Gardnerville Ranchos, NV-CA CSA | 699,307 | +2.14% | 684,678 | +13.04% | 605,720 |