Image of diversityDemographics Overview

San Joaquin County’s population has increased recently and continues to swell. Racial and ethnic diversity will increase. Hispanic and Latino populations have been the largest racial or ethinic group since 2010, and will grow more in the future. By age, young (0–19) and old (60+) age groups will dominate San Joaquin County.

Demographics by Race

San Joaquin County's ethnic breakdown reveals that “Hispanic or Latino” (41.8%) represents the largest racial or ethnic group. The "White Alone" population is also large (27.7%).

Languages Spoken at Home

A wide variety of languages are spoken at home in San Joaquin County. After English, Spanish and Tagalog are the most common languages spoken at home.

 Language Spoken at Home 5
 Years and Over
Est. Number of Speakers
Indo-European Languages  
     Speak English Only 416,233
     Spanish 180,852
     German or other West Germanic 1,072
     Russian, Polish, or other Slavic 935
     French, Haitian, or Cajun 822
     Other Indo-European 32,883
Asian and Pacific Island Languages  
     Tagalog 20,478
     Chinese (incl. Mandarin, Cantonese) 7,906
     Vietnamese 6,779
     Korean 1,096
     Other Asian and Pacific Island 24,525
Other Languages  
     Arabic 3,928
     Other and Unspecified  1,716

39 Languages spoken in San Joaquin County


Age Distribution
San Joaquin County leans younger — 29.9% of its population is under 20 and 46.1% of its population includes millennials and Gen X-ers (20–54). San Joaquin County's median age is (34.7 years) below those of California and the U.S. We predict the county’s most prominent age group will be 0–19 year-olds in the next 40 years.

Age Total Estimate Percent of Population
0-19 224,667 29.9%
20-54 346,891 46.1%
55-64 84,108 11.2%
65 and over 95,949 12.8%

Population Forecasts

What is Forecasting? Forecasting uses current and historical trends interpreted into graphs and percentages. We then use these projections to model what our county may look like in 20 to 40 years.

Forecast by Race and Ethnicity
This UOP Center for Business and Policy Research (CBPR) projection shows our region's racial and ethnic make-up using historical data through 2018. It shows our growing populations will be primarily Hispanic, while our White populations will decrease in size.

Forecast by Age

This CBPR forecast shows the 65+ age group more than doubling in size from 2020 to 2060. The forecasts also show that the 15-24 age group reducing in size between 2030 and 2040. 

  1. Tim Kohaya

    Timothy Kohaya

    Senior Regional Planner
    Phone: 209-235-0389

  2. ANDERSON_ISAIAH-0001 (1)

    Isaiah Anderson

    Assistant Regional Planner
    Phone: 209-235-0452