Interpretation of Demographics Data
Demographic Data Report for California by County
Population: Age under 18
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 22.2 percent.
- People (Age Under 18) : The number of people (age under 18) is 8,729,012.
- Rank within US : This state is ranked 23 of 52
United States
- 2023 Rural-Urban Continuum Codes Φ : N/A
- Value (Percent) : The value is 22.2 percent.
- People (Age Under 18) : The number of people (age under 18) is 73,645,238.
- Rank within US : N/A
Sierra County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 12.8 percent.
- People (Age Under 18) : The number of people (age under 18) is 349.
- Rank within US : This county is ranked 3111 of 3143
San Francisco County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 13.7 percent.
- People (Age Under 18) : The number of people (age under 18) is 114,728.
- Rank within US : This county is ranked 3100 of 3143
Amador County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 15.5 percent.
- People (Age Under 18) : The number of people (age under 18) is 6,356.
- Rank within US : This county is ranked 3036 of 3143
Mariposa County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 16.8 percent.
- People (Age Under 18) : The number of people (age under 18) is 2,874.
- Rank within US : This county is ranked 2927 of 3143
Calaveras County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 16.9 percent.
- People (Age Under 18) : The number of people (age under 18) is 7,768.
- Rank within US : This county is ranked 2917 of 3143
Nevada County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 17.1 percent.
- People (Age Under 18) : The number of people (age under 18) is 17,514.
- Rank within US : This county is ranked 2892 of 3143
Tuolumne County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 17.2 percent.
- People (Age Under 18) : The number of people (age under 18) is 9,428.
- Rank within US : This county is ranked 2882 of 3143
Plumas County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 17.5 percent.
- People (Age Under 18) : The number of people (age under 18) is 3,430.
- Rank within US : This county is ranked 2844 of 3143
San Luis Obispo County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 17.6 percent.
- People (Age Under 18) : The number of people (age under 18) is 49,564.
- Rank within US : This county is ranked 2835 of 3143
Lassen County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 17.9 percent.
- People (Age Under 18) : The number of people (age under 18) is 5,580.
- Rank within US : This county is ranked 2778 of 3143
Trinity County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 18.3 percent.
- People (Age Under 18) : The number of people (age under 18) is 2,912.
- Rank within US : This county is ranked 2702 of 3143
Mono County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 18.4 percent.
- People (Age Under 18) : The number of people (age under 18) is 2,419.
- Rank within US : This county is ranked 2684 of 3143
Santa Cruz County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 18.8 percent.
- People (Age Under 18) : The number of people (age under 18) is 49,902.
- Rank within US : This county is ranked 2608 of 3143
Humboldt County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 19.0 percent.
- People (Age Under 18) : The number of people (age under 18) is 25,685.
- Rank within US : This county is ranked 2557 of 3143
Modoc County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 19.2 percent.
- People (Age Under 18) : The number of people (age under 18) is 1,661.
- Rank within US : This county is ranked 2514 of 3143
Sonoma County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 19.3 percent.
- People (Age Under 18) : The number of people (age under 18) is 93,938.
- Rank within US : This county is ranked 2489 of 3143
El Dorado County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 19.7 percent.
- People (Age Under 18) : The number of people (age under 18) is 37,917.
- Rank within US : This county is ranked 2378 of 3143
Marin County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 19.7 percent.
- People (Age Under 18) : The number of people (age under 18) is 51,012.
- Rank within US : This county is ranked 2378 of 3143
Napa County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 19.9 percent.
- People (Age Under 18) : The number of people (age under 18) is 27,023.
- Rank within US : This county is ranked 2329 of 3143
San Mateo County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 19.9 percent.
- People (Age Under 18) : The number of people (age under 18) is 148,064.
- Rank within US : This county is ranked 2329 of 3143
Alameda County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 20.0 percent.
- People (Age Under 18) : The number of people (age under 18) is 331,035.
- Rank within US : This county is ranked 2300 of 3143
Siskiyou County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 20.1 percent.
- People (Age Under 18) : The number of people (age under 18) is 8,827.
- Rank within US : This county is ranked 2274 of 3143
Inyo County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 20.3 percent.
- People (Age Under 18) : The number of people (age under 18) is 3,819.
- Rank within US : This county is ranked 2213 of 3143
Butte County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 20.5 percent.
- People (Age Under 18) : The number of people (age under 18) is 42,935.
- Rank within US : This county is ranked 2151 of 3143
Yolo County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 20.5 percent.
- People (Age Under 18) : The number of people (age under 18) is 44,638.
- Rank within US : This county is ranked 2151 of 3143
Los Angeles County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 20.9 percent.
- People (Age Under 18) : The number of people (age under 18) is 2,057,536.
- Rank within US : This county is ranked 2008 of 3143
Del Norte County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 21.0 percent.
- People (Age Under 18) : The number of people (age under 18) is 5,728.
- Rank within US : This county is ranked 1977 of 3143
Santa Clara County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 21.0 percent.
- People (Age Under 18) : The number of people (age under 18) is 398,753.
- Rank within US : This county is ranked 1977 of 3143
Mendocino County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 21.1 percent.
- People (Age Under 18) : The number of people (age under 18) is 19,142.
- Rank within US : This county is ranked 1936 of 3143
San Diego County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 21.1 percent.
- People (Age Under 18) : The number of people (age under 18) is 694,169.
- Rank within US : This county is ranked 1936 of 3143
Orange County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 21.3 percent.
- People (Age Under 18) : The number of people (age under 18) is 674,833.
- Rank within US : This county is ranked 1876 of 3143
Shasta County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 21.7 percent.
- People (Age Under 18) : The number of people (age under 18) is 39,404.
- Rank within US : This county is ranked 1683 of 3143
Lake County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 21.8 percent.
- People (Age Under 18) : The number of people (age under 18) is 14,828.
- Rank within US : This county is ranked 1646 of 3143
Placer County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 22.0 percent.
- People (Age Under 18) : The number of people (age under 18) is 90,610.
- Rank within US : This county is ranked 1567 of 3143
Solano County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 22.1 percent.
- People (Age Under 18) : The number of people (age under 18) is 99,424.
- Rank within US : This county is ranked 1518 of 3143
Contra Costa County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 22.2 percent.
- People (Age Under 18) : The number of people (age under 18) is 258,092.
- Rank within US : This county is ranked 1469 of 3143
Ventura County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 22.2 percent.
- People (Age Under 18) : The number of people (age under 18) is 185,795.
- Rank within US : This county is ranked 1469 of 3143
Santa Barbara County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 22.4 percent.
- People (Age Under 18) : The number of people (age under 18) is 99,608.
- Rank within US : This county is ranked 1385 of 3143
Alpine County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 22.6 percent.
- People (Age Under 18) : The number of people (age under 18) is 383.
- Rank within US : This county is ranked 1288 of 3143
Sacramento County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 23.1 percent.
- People (Age Under 18) : The number of people (age under 18) is 365,667.
- Rank within US : This county is ranked 1087 of 3143
Tehama County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 24.1 percent.
- People (Age Under 18) : The number of people (age under 18) is 15,783.
- Rank within US : This county is ranked 687 of 3143
Riverside County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 24.4 percent.
- People (Age Under 18) : The number of people (age under 18) is 598,671.
- Rank within US : This county is ranked 594 of 3143
Sutter County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 25.4 percent.
- People (Age Under 18) : The number of people (age under 18) is 25,168.
- Rank within US : This county is ranked 378 of 3143
San Benito County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 25.5 percent.
- People (Age Under 18) : The number of people (age under 18) is 16,820.
- Rank within US : This county is ranked 355 of 3143
San Bernardino County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 25.8 percent.
- People (Age Under 18) : The number of people (age under 18) is 563,979.
- Rank within US : This county is ranked 315 of 3143
Monterey County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 26.0 percent.
- People (Age Under 18) : The number of people (age under 18) is 113,201.
- Rank within US : This county is ranked 281 of 3143
Glenn County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 26.2 percent.
- People (Age Under 18) : The number of people (age under 18) is 7,501.
- Rank within US : This county is ranked 259 of 3143
San Joaquin County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 26.5 percent.
- People (Age Under 18) : The number of people (age under 18) is 208,930.
- Rank within US : This county is ranked 234 of 3143
Stanislaus County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 26.9 percent.
- People (Age Under 18) : The number of people (age under 18) is 148,315.
- Rank within US : This county is ranked 204 of 3143
Kings County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 27.1 percent.
- People (Age Under 18) : The number of people (age under 18) is 41,374.
- Rank within US : This county is ranked 187 of 3143
Colusa County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 27.3 percent.
- People (Age Under 18) : The number of people (age under 18) is 5,987.
- Rank within US : This county is ranked 176 of 3143
Yuba County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 27.3 percent.
- People (Age Under 18) : The number of people (age under 18) is 22,640.
- Rank within US : This county is ranked 176 of 3143
Madera County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 27.4 percent.
- People (Age Under 18) : The number of people (age under 18) is 43,447.
- Rank within US : This county is ranked 173 of 3143
Fresno County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 28.0 percent.
- People (Age Under 18) : The number of people (age under 18) is 283,823.
- Rank within US : This county is ranked 136 of 3143
Imperial County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 28.5 percent.
- People (Age Under 18) : The number of people (age under 18) is 51,116.
- Rank within US : This county is ranked 121 of 3143
Kern County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 28.8 percent.
- People (Age Under 18) : The number of people (age under 18) is 262,550.
- Rank within US : This county is ranked 115 of 3143
Merced County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 29.1 percent.
- People (Age Under 18) : The number of people (age under 18) is 83,242.
- Rank within US : This county is ranked 103 of 3143
Tulare County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 30.1 percent.
- People (Age Under 18) : The number of people (age under 18) is 143,115.
- Rank within US : This county is ranked 74 of 3143
Notes:
Created by statecancerprofiles.cancer.gov on 07/03/2025 9:48 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 under 18, see the dictionary.
Data for United States does not include Puerto Rico.