Market insights · California
Contra Costa County, CA: growth, migration and housing
Contra Costa County has 1,170,070 residents, up 0.3% since 2020 (+0.1% in the last year). In 2022–2023, 24,773 households moved in and 28,629 moved out (-3,856 net), while a net $452.0M of income left. Median household income is $127,229, the median home $866,800 and median rent $2,375 a month.
In California: 21st of 58 counties for 5-year population growth · 39th of 58 counties for net in-migration (per resident) · 6th of 58 counties for median household income · 9th of 58 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Contra Costa County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Alameda County, CA | 7,141 | $1014.6M |
| San Francisco County, CA | 2,092 | $331.9M |
| Santa Clara County, CA | 1,655 | $346.3M |
| San Mateo County, CA | 1,313 | $206.4M |
| Solano County, CA | 1,294 | $101.3M |
| Los Angeles County, CA | 877 | $107.9M |
| San Joaquin County, CA | 747 | $56.0M |
| Sacramento County, CA | 684 | $49.4M |
Where leavers went
Top counties by households leaving Contra Costa County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Alameda County, CA | 4,871 | $628.8M |
| Solano County, CA | 2,151 | $177.9M |
| San Francisco County, CA | 1,661 | $165.0M |
| Sacramento County, CA | 1,170 | $91.4M |
| Los Angeles County, CA | 1,011 | $106.8M |
| Santa Clara County, CA | 1,002 | $136.8M |
| San Joaquin County, CA | 977 | $83.4M |
| San Mateo County, CA | 839 | $101.0M |
BizyFi in Contra Costa County
14 companies in the BizyFi directory are based here. Search them on the company map (company names with a free account), or browse California companies.
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Sources: U.S. Census Bureau population estimates (vintage 2025), American Community Survey 5-year (2024), and IRS Statistics of Income county-to-county migration data (2022–2023). Migration counts are tax returns (roughly households) moving between U.S. counties; the IRS suppresses very small flows. Growth rates, per-1,000 figures, rent share and state ranks are BizyFi calculations. Data updated 2026-10-17. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.