Alameda County, CA → Contra Costa County, CA
Reported tax-filing households, individuals, and adjusted gross income that moved from Alameda County, CA to Contra Costa County, CA, 2022–2023.
Households moved
7,141
People moved
12,831
Reported AGI moved
$1.01B
Avg. AGI per migrating return
$142,082
Avg. household size
1.80
Reported county-pair flows
1
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.”