Contra Costa County vs San Joaquin County
A side-by-side comparison of Contra Costa County and San Joaquin County: population, income, housing, and more.
Contra Costa County and San Joaquin County are counties in California. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.
Contra Costa County has the higher population (1,161,458 vs 787,416 in San Joaquin County). Contra Costa County has the higher median household income ($125,727 vs $88,531 in San Joaquin County). Contra Costa County has the higher median home value ($830,800 vs $494,500 in San Joaquin County).
Population, income & housing
| Contra Costa County | San Joaquin County | |
|---|---|---|
| Population | 1,161,458 | 787,416 |
| Median age | 40.3 yrs | 35.2 yrs |
| Median household income | $125,727 | $88,531 |
| Median home value | $830,800 | $494,500 |
| Median gross rent | $2,322 | $1,633 |
| Housing units | 426,585 | 256,826 |
| Homeownership rate | 67.7% | 61.5% |
| Bachelor's degree or higher | 44.9% | 21.6% |
| Unemployment rate | 5.9% | 7.4% |
Trends (ACS 5-year, 2019–2023)
| Contra Costa County | San Joaquin County | |
|---|---|---|
| Population | 1,142,251 → 1,161,458 (+1.7%) | 742,603 → 787,416 (+6.0%) |
| Median household income | $99,716 → $125,727 (+26.1%) | $64,432 → $88,531 (+37.4%) |
| Median home value | $625,800 → $830,800 (+32.8%) | $342,100 → $494,500 (+44.5%) |
| Median gross rent | $1,819 → $2,322 (+27.7%) | $1,208 → $1,633 (+35.2%) |
Contra Costa County
1,142,2511,161,458
$99,716$125,727
$625,800$830,800
$1,819$2,322
San Joaquin County
742,603787,416
$64,432$88,531
$342,100$494,500
$1,208$1,633
Age & race/ethnicity
Age distribution (share)
| Contra Costa County | San Joaquin County | |
|---|---|---|
| Under 5 | 5.4% | 6.6% |
| 5 to 17 | 16.8% | 19.9% |
| 18 to 24 | 8.0% | 9.4% |
| 25 to 34 | 12.3% | 13.8% |
| 35 to 44 | 14.0% | 13.8% |
| 45 to 54 | 13.7% | 12.0% |
| 55 to 64 | 13.2% | 11.2% |
| 65 to 74 | 9.8% | 8.0% |
| 75 and over | 6.9% | 5.3% |
Race & ethnicity (share)
| Contra Costa County | San Joaquin County | |
|---|---|---|
| White (non-Hispanic) | 39.3% | 27.9% |
| Black or African American | 8.2% | 6.7% |
| American Indian & Alaska Native | 0.2% | 0.3% |
| Asian | 18.3% | 17.5% |
| Native Hawaiian & Pacific Islander | 0.4% | 0.6% |
| Some other race | 0.7% | 0.4% |
| Two or more races | 5.8% | 4.4% |
| Hispanic or Latino | 27.3% | 42.2% |
Educational attainment (age 25+)
Share of adults 25+
| Contra Costa County | San Joaquin County | |
|---|---|---|
| No high school diploma | 10.4% | 19.6% |
| High school graduate | 17.7% | 27.8% |
| Some college or associate's | 27.0% | 31.1% |
| Bachelor's degree | 27.4% | 14.6% |
| Graduate or professional degree | 17.5% | 7.0% |
Commute to work
How workers get to work (share)
| Contra Costa County | San Joaquin County | |
|---|---|---|
| Drove alone | 60.8% | 74.8% |
| Carpooled | 9.7% | 12.4% |
| Public transit | 6.5% | 1.1% |
| Walked | 1.8% | 1.1% |
| Bicycle | 0.4% | 0.3% |
| Worked from home | 19.2% | 9.3% |
| Other means | 1.6% | 1.0% |
Housing
Units in structure (share)
| Contra Costa County | San Joaquin County | |
|---|---|---|
| 1-unit, detached | 67.5% | 74.7% |
| 1-unit, attached | 8.7% | 5.0% |
| 2 to 4 units | 5.8% | 5.1% |
| 5 to 19 units | 6.6% | 5.7% |
| 20 or more units | 10.0% | 6.3% |
| Mobile home & other | 1.6% | 3.2% |
Poverty & households
| Contra Costa County | San Joaquin County | |
|---|---|---|
| Poverty rate | 8.3% | 12.6% |
| Average household size | 2.79 | 3.19 |
| Mean commute (minutes) | 36 | 35 |
| Median year structure built | 1978 | 1983 |
Full profiles
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