San Mateo County, CA → Washington
Reported tax-filing households, individuals, and adjusted gross income that moved from San Mateo County, CA to Washington, 2022–2023.
Households moved
536
People moved
767
Reported AGI moved
$99.29M
Avg. AGI per migrating return
$185,248
Avg. household size
1.43
Reported county-pair flows
5
County-by-county breakdown
| Origin | Destination | Households | People | Reported AGI |
|---|---|---|---|---|
| San Mateo County, CA | King County, WA | 397 | 556 | $76.85M |
| San Mateo County, CA | Snohomish County, WA | 40 | 61 | $8.59M |
| San Mateo County, CA | Clark County, WA | 41 | 65 | $5.90M |
| San Mateo County, CA | Pierce County, WA | 38 | 57 | $5.77M |
| San Mateo County, CA | Whatcom County, WA | 20 | 28 | $2.19M |
IRS migration data does not represent every U.S. resident (non-filers are underrepresented), a mailing address does not always equal a physical residence, and AGI reflects Year 2 tax returns without proving income was earned after arrival. Use “income moved” or “reported AGI moved,” not “economic impact created.”