Sacramento County vs San Joaquin County
Two neighbouring counties in California, compared on population, size, income and housing. They share 48 mi of border.
Sacramento County
California
San Joaquin County
California
Both outlines are drawn at true relative size. San Joaquin County spans about 84.1 km at its widest.
Side by side
| Measure | Sacramento County | Difference | San Joaquin County |
|---|---|---|---|
| Population | 1,618,460 | +96.5% | 823,815 |
| Change since 2020 | 2.0% | -3.5 pp | 5.5% |
| Land area | 965.4 sq mi | -30.7% | 1,392 sq mi |
| Population density | 1,677 per sq mi | +183.3% | 592 per sq mi |
| Median household income | $92,175 | the same | $92,179 |
| Median home value | $534,200 | +0.7% | $530,700 |
| Median age | 37.5 | +5.9% | 35.4 |
| Households | 571,057 | +132.8% | 245,250 |
| Housing units | 598,385 | +130.0% | 260,151 |
Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026; US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. The difference column is computed here: the first county's figure against the second, expressed as a percentage of the second. The change-since-2020 row is the exception: two growth rates differ in percentage points (pp), not percent. Retrieved 30 August 2026.
What the numbers say
- Sacramento County holds about 2.0 times the population of San Joaquin County: 1,618,460 against 823,815.
- San Joaquin County covers more ground, at 1,392 square miles against 965.4.
- Sacramento County is the more crowded of the two, at 1,677 people per square mile against 592.
- Median household income is higher in San Joaquin County, by 4 dollars a year.
- Since 2020, Sacramento County has grown by 2.0% and San Joaquin County has grown by 5.5%.
- They share 48 mi of common border, which the Census Bureau publishes in its county adjacency file and which almost no other county reference presents.
Full pages
Want a different pair? Compare any two of the 3,144 US counties.
Rebuilt from source data 30 August 2026. How these figures are produced.