As of 2026 the population of San Joaquin County is 827,568. The population is expected to grow to 861,487 by 2031 - a growth rate of 0.81%.
The median age of San Joaquin County residents is 36.
The diversity index of San Joaquin County is 88.6, meaning that there is a 89% chance that any two people selected out of 100 residents will be of different race or ethnicity from one another.
The average household income in San Joaquin County is $126,186 and projected to be $141,010 in 2031. Per capita income is $39,978, projected to be $44,952 in 2031. 5.23% of households – 43,294 – have an income of $200,000 or higher. Average net worth is $1,373,024 and the average disposable income is $93,186.
There are 273,199 housing units in San Joaquin County; 161,558 are owner-occupied, 99,000 are rented, and 12,641 are vacant. The average home value is $644,394, with 28,367 homes built in 2010 or later, and 17,705 built in 1939 or earlier.
There are 21,492 businesses in San Joaquin County, employing 242,228 workers and pulling from a labor force of 337,508 age 16 and above. 84,577 workers commute into San Joaquin County from outside the county or state. Key industries for the area include:
252,208 residents both live and work in/around San Joaquin County. The average travel time is 34.1 minutes. 2.98% people have a commute of less than 5 minutes while 11.99% commute 90 minutes or more each way. Of commuters, 248,632 drive alone, 41,532 carpool, and 3,011 take public transportation. 7,887 use other modes of transport such as motorcycle, bicycle, walking, etc. 35,817 residents work from home.
156,332 members of the workforce hold a high school diploma or GED. 54,488 have associates degrees, 94,654 have bachelor’s degrees, and 42,050 hold a graduate or professional degree.
Source: ESRI, 2026-09-09
