Where Are People Moving in Contra Costa, CA?
IRS county-to-county migration, 2023 tax year (released about two years after the tax year it covers).
People moving in
22,133
People moving out
25,170
Net migration
-5,010
Contra Costa, CA is a net loser of residents. In the latest IRS data (2023 tax year), 22,133 people moved in and 25,170 moved out, for a net loss of -5,010. Net outflows can soften local rent and price growth over time, though the cause matters as much as the number.
Migration is most useful read alongside the rest of the market. People move for jobs, affordability, climate, and lifestyle, and where they come from and go to says a lot about what a county is competing on. Below are the specific counties driving Contra Costa, CA’s flows in each direction.
Top counties people moved to Contra Costa, CA from
| Origin county | Returns | People |
|---|---|---|
| Alameda, CACalifornia | 7,141 | 12,831 |
| San Francisco, CACalifornia | 2,092 | 3,554 |
| Santa Clara, CACalifornia | 1,655 | 3,245 |
| San Mateo, CACalifornia | 1,313 | 2,428 |
| Solano, CACalifornia | 1,294 | 2,147 |
| Los Angeles, CACalifornia | 877 | 1,306 |
| San Joaquin, CACalifornia | 747 | 1,366 |
| Sacramento, CACalifornia | 684 | 1,066 |
| San Diego, CACalifornia | 387 | 570 |
| Marin, CACalifornia | 354 | 575 |
Top counties people left Contra Costa, CA for
| Destination county | Returns | People |
|---|---|---|
| Alameda, CACalifornia | 4,871 | 7,605 |
| Solano, CACalifornia | 2,151 | 3,871 |
| San Francisco, CACalifornia | 1,661 | 2,309 |
| Sacramento, CACalifornia | 1,170 | 1,960 |
| Los Angeles, CACalifornia | 1,011 | 1,396 |
| Santa Clara, CACalifornia | 1,002 | 1,540 |
| San Joaquin, CACalifornia | 977 | 1,931 |
| San Mateo, CACalifornia | 839 | 1,317 |
| San Diego, CACalifornia | 650 | 934 |
| Placer, CACalifornia | 424 | 818 |
“Returns” counts tax returns (a household proxy) that moved along each flow; “People” counts the individuals on those returns, when reported. IRS aggregate and foreign pseudo-rows are excluded. Informational only, not financial advice.
Frequently asked questions
Are people moving to Contra Costa, CA or leaving?
Contra Costa, CA had a net loss of -5,010 residents in the latest IRS data (2023 tax year), with 22,133 people moving in and 25,170 moving out. Net migration is inflow minus outflow.
Where are people moving to Contra Costa, CA from?
The largest sources of new Contra Costa, CA residents are Alameda, CA, San Francisco, CA, Santa Clara, CA. The full top-ten list of origin counties is in the table above.
Where do people leaving Contra Costa, CA go?
People leaving Contra Costa, CA most often move to Alameda, CA, Solano, CA, San Francisco, CA. The full top-ten list of destination counties is in the table above.
What does Contra Costa, CA migration mean for housing?
Migration is a leading demand signal. Sustained net inflows tend to support rents and home prices when supply cannot keep up, while net outflows can soften them. Read this alongside Contra Costa, CA's price forecast, building permits, and affordability on the full county dashboard before drawing a conclusion.
How current is this Contra Costa, CA migration data?
It comes from IRS Statistics of Income county-to-county migration data, which is released about two years after the tax year it covers; the figures above reflect the 2023 tax year. That lag is normal for this dataset, which counts actual tax returns rather than survey estimates.