Illinois → King County, WA
Reported tax-filing households, individuals, and adjusted gross income that moved from Illinois to King County, WA, 2022–2023.
Households moved
1,381
People moved
1,764
Reported AGI moved
$174.76M
Avg. AGI per migrating return
$126,544
Avg. household size
1.28
Reported county-pair flows
7
County-by-county breakdown
| Origin | Destination | Households | People | Reported AGI |
|---|---|---|---|---|
| Cook County, IL | King County, WA | 954 | 1,209 | $120.74M |
| Lake County, IL | King County, WA | 89 | 117 | $16.81M |
| DuPage County, IL | King County, WA | 139 | 193 | $16.67M |
| Champaign County, IL | King County, WA | 105 | 123 | $11.03M |
| Will County, IL | King County, WA | 47 | 55 | $3.96M |
| Kane County, IL | King County, WA | 25 | 35 | $2.81M |
| St. Clair County, IL | King County, WA | 22 | 32 | $2.75M |
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.”