State Cancer Profiles

Interpretation of Demographics Data

Demographic Data Report for California by County
Population: Age 18-39
All Races (includes Hispanic), Both Sexes
2019-2023 American Community Survey 5-Year Data
Sorted by Value

California

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Value (Percent) : The value is 31.1 percent.
• People (Age 18-39) : The number of people (age 18-39) is 12,197,308.
• Rank within US : This state is ranked 7 of 52

United States

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Value (Percent) : The value is 29.5 percent.
• People (Age 18-39) : The number of people (age 18-39) is 98,058,393.
• Rank within US : N/A

Yolo County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 39.5 percent.
• People (Age 18-39) : The number of people (age 18-39) is 85,998.
• Rank within US : This county is ranked 67 of 3143

San Francisco County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 36.8 percent.
• People (Age 18-39) : The number of people (age 18-39) is 307,797.
• Rank within US : This county is ranked 99 of 3143

Kings County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 35.0 percent.
• People (Age 18-39) : The number of people (age 18-39) is 53,520.
• Rank within US : This county is ranked 156 of 3143

Lassen County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 34.7 percent.
• People (Age 18-39) : The number of people (age 18-39) is 10,819.
• Rank within US : This county is ranked 170 of 3143

Butte County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 34.0 percent.
• People (Age 18-39) : The number of people (age 18-39) is 71,148.
• Rank within US : This county is ranked 190 of 3143

Santa Barbara County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 33.9 percent.
• People (Age 18-39) : The number of people (age 18-39) is 150,471.
• Rank within US : This county is ranked 196 of 3143

San Diego County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 33.1 percent.
• People (Age 18-39) : The number of people (age 18-39) is 1,087,181.
• Rank within US : This county is ranked 230 of 3143

Yuba County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 32.6 percent.
• People (Age 18-39) : The number of people (age 18-39) is 27,125.
• Rank within US : This county is ranked 250 of 3143

Santa Clara County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 32.3 percent.
• People (Age 18-39) : The number of people (age 18-39) is 614,106.
• Rank within US : This county is ranked 265 of 3143

San Luis Obispo County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 32.2 percent.
• People (Age 18-39) : The number of people (age 18-39) is 90,637.
• Rank within US : This county is ranked 276 of 3143

Merced County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 32.1 percent.
• People (Age 18-39) : The number of people (age 18-39) is 91,698.
• Rank within US : This county is ranked 281 of 3143

Alameda County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 32.0 percent.
• People (Age 18-39) : The number of people (age 18-39) is 528,045.
• Rank within US : This county is ranked 292 of 3143

Los Angeles County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 32.0 percent.
• People (Age 18-39) : The number of people (age 18-39) is 3,156,229.
• Rank within US : This county is ranked 292 of 3143

San Bernardino County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 31.9 percent.
• People (Age 18-39) : The number of people (age 18-39) is 698,760.
• Rank within US : This county is ranked 297 of 3143

Kern County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 31.8 percent.
• People (Age 18-39) : The number of people (age 18-39) is 289,860.
• Rank within US : This county is ranked 303 of 3143

Humboldt County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 31.7 percent.
• People (Age 18-39) : The number of people (age 18-39) is 42,890.
• Rank within US : This county is ranked 310 of 3143

Santa Cruz County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 31.7 percent.
• People (Age 18-39) : The number of people (age 18-39) is 84,269.
• Rank within US : This county is ranked 310 of 3143

Fresno County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 31.6 percent.
• People (Age 18-39) : The number of people (age 18-39) is 320,218.
• Rank within US : This county is ranked 317 of 3143

San Benito County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 31.1 percent.
• People (Age 18-39) : The number of people (age 18-39) is 20,565.
• Rank within US : This county is ranked 361 of 3143

Sacramento County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 31.0 percent.
• People (Age 18-39) : The number of people (age 18-39) is 491,336.
• Rank within US : This county is ranked 369 of 3143

Tulare County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 31.0 percent.
• People (Age 18-39) : The number of people (age 18-39) is 147,509.
• Rank within US : This county is ranked 369 of 3143

Imperial County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 30.9 percent.
• People (Age 18-39) : The number of people (age 18-39) is 55,457.
• Rank within US : This county is ranked 376 of 3143

Mono County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 30.9 percent.
• People (Age 18-39) : The number of people (age 18-39) is 4,070.
• Rank within US : This county is ranked 376 of 3143

Stanislaus County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 30.3 percent.
• People (Age 18-39) : The number of people (age 18-39) is 167,562.
• Rank within US : This county is ranked 440 of 3143

Monterey County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 30.1 percent.
• People (Age 18-39) : The number of people (age 18-39) is 131,085.
• Rank within US : This county is ranked 470 of 3143

San Joaquin County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 30.1 percent.
• People (Age 18-39) : The number of people (age 18-39) is 237,311.
• Rank within US : This county is ranked 470 of 3143

Riverside County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 29.9 percent.
• People (Age 18-39) : The number of people (age 18-39) is 733,482.
• Rank within US : This county is ranked 500 of 3143

Orange County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 29.8 percent.
• People (Age 18-39) : The number of people (age 18-39) is 944,371.
• Rank within US : This county is ranked 512 of 3143

Madera County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 29.6 percent.
• People (Age 18-39) : The number of people (age 18-39) is 47,031.
• Rank within US : This county is ranked 549 of 3143

San Mateo County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 29.3 percent.
• People (Age 18-39) : The number of people (age 18-39) is 217,956.
• Rank within US : This county is ranked 602 of 3143

Solano County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 29.3 percent.
• People (Age 18-39) : The number of people (age 18-39) is 132,209.
• Rank within US : This county is ranked 602 of 3143

Sutter County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 29.0 percent.
• People (Age 18-39) : The number of people (age 18-39) is 28,684.
• Rank within US : This county is ranked 662 of 3143

Ventura County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 28.6 percent.
• People (Age 18-39) : The number of people (age 18-39) is 239,337.
• Rank within US : This county is ranked 738 of 3143

Del Norte County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 28.2 percent.
• People (Age 18-39) : The number of people (age 18-39) is 7,692.
• Rank within US : This county is ranked 813 of 3143

Glenn County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 28.2 percent.
• People (Age 18-39) : The number of people (age 18-39) is 8,064.
• Rank within US : This county is ranked 813 of 3143

Colusa County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 27.3 percent.
• People (Age 18-39) : The number of people (age 18-39) is 5,982.
• Rank within US : This county is ranked 1035 of 3143

Contra Costa County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 27.3 percent.
• People (Age 18-39) : The number of people (age 18-39) is 317,063.
• Rank within US : This county is ranked 1035 of 3143

Napa County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 26.9 percent.
• People (Age 18-39) : The number of people (age 18-39) is 36,622.
• Rank within US : This county is ranked 1143 of 3143

Sonoma County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 26.8 percent.
• People (Age 18-39) : The number of people (age 18-39) is 130,184.
• Rank within US : This county is ranked 1180 of 3143

Alpine County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 26.3 percent.
• People (Age 18-39) : The number of people (age 18-39) is 446.
• Rank within US : This county is ranked 1356 of 3143

Shasta County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 25.9 percent.
• People (Age 18-39) : The number of people (age 18-39) is 47,013.
• Rank within US : This county is ranked 1514 of 3143

Tehama County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 25.7 percent.
• People (Age 18-39) : The number of people (age 18-39) is 16,858.
• Rank within US : This county is ranked 1585 of 3143

Placer County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 24.6 percent.
• People (Age 18-39) : The number of people (age 18-39) is 101,371.
• Rank within US : This county is ranked 1991 of 3143

Mendocino County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 24.4 percent.
• People (Age 18-39) : The number of people (age 18-39) is 22,098.
• Rank within US : This county is ranked 2056 of 3143

Amador County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 23.6 percent.
• People (Age 18-39) : The number of people (age 18-39) is 9,673.
• Rank within US : This county is ranked 2294 of 3143

Tuolumne County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 23.4 percent.
• People (Age 18-39) : The number of people (age 18-39) is 12,850.
• Rank within US : This county is ranked 2359 of 3143

Lake County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 23.3 percent.
• People (Age 18-39) : The number of people (age 18-39) is 15,865.
• Rank within US : This county is ranked 2387 of 3143

El Dorado County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 23.2 percent.
• People (Age 18-39) : The number of people (age 18-39) is 44,529.
• Rank within US : This county is ranked 2414 of 3143

Modoc County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 22.3 percent.
• People (Age 18-39) : The number of people (age 18-39) is 1,926.
• Rank within US : This county is ranked 2639 of 3143

Inyo County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 22.2 percent.
• People (Age 18-39) : The number of people (age 18-39) is 4,166.
• Rank within US : This county is ranked 2663 of 3143

Siskiyou County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 21.9 percent.
• People (Age 18-39) : The number of people (age 18-39) is 9,620.
• Rank within US : This county is ranked 2718 of 3143

Nevada County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 21.7 percent.
• People (Age 18-39) : The number of people (age 18-39) is 22,265.
• Rank within US : This county is ranked 2751 of 3143

Plumas County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 21.5 percent.
• People (Age 18-39) : The number of people (age 18-39) is 4,212.
• Rank within US : This county is ranked 2780 of 3143

Calaveras County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 21.0 percent.
• People (Age 18-39) : The number of people (age 18-39) is 9,668.
• Rank within US : This county is ranked 2857 of 3143

Marin County

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Value (Percent) : The value is 20.8 percent.
• People (Age 18-39) : The number of people (age 18-39) is 53,859.
• Rank within US : This county is ranked 2882 of 3143

Mariposa County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 20.1 percent.
• People (Age 18-39) : The number of people (age 18-39) is 3,425.
• Rank within US : This county is ranked 2954 of 3143

Trinity County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 16.8 percent.
• People (Age 18-39) : The number of people (age 18-39) is 2,676.
• Rank within US : This county is ranked 3099 of 3143

Sierra County

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Value (Percent) : The value is 16.3 percent.
• People (Age 18-39) : The number of people (age 18-39) is 445.
• Rank within US : This county is ranked 3116 of 3143

Notes:
Created by statecancerprofiles.cancer.gov on 05/24/2025 1:30 pm.

Φ Rural-Urban Continuum Codes provided by the USDA.

Source: Demographic data provided by the Census Bureau and the American Community Survey.
For more information about Population: Age 18-39, see the dictionary.

Data for United States does not include Puerto Rico.