1. Demographics
  2. Population Forecasts
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San Joaquin County’s population has increased recently and continues to grow even more rapidly. As it grows, the racial and ethnic diversity of the county is expected to increase. Hispanic and Latino populations have become the largest racial or ethinic group since 2010, and that population will grow even larger in the future. By age, San Joaquin County will grow in both the youngest (0–19 years) and oldest (60+) age groups.

Demographics by Race 

The county’s ethnic breakdown reveals that “Hispanic or Latino” (40.5%) represents the largest racial or ethnic group. However, San Joaquin County also has a large "White Alone" population (33.9%).

39 Languages spoke in San Joaquin County
 Rank  Language Spoken at Home  Number of Speakers
 1  English  404,956
 2  Spanish  179,618
 3  Tagalog  21,524
 4  Punjabi  13,606
 5  Chinese  9,615
 6 Khmer  8,027
 7  Vietnamese  7,270
 8  Arabic  5,610
 9  Persian  4,109
 10  Hmong  3,939

Age Distribution

San Joaquin County leans toward the younger side, as 30.6% of its population is under 20. The next biggest age group includes mostly millennials and Gen X-ers (20–54) at 46.6%.This lowers the San Joaquin County median age (34.3 years) below those of California and the U.S. Our forecast predicts the county’s most prominent age group will be 0–19 year-olds over the next 40 years (see forecast).

 Age  Percent of Population
 0-19  30.6%
 20-54  46.6%
 55-64  11.0%
 65 and over  11.9%