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County-to-county migration · IRS SOI · filing years 2022-2023
Net migration: +351 tax returns · +699 people · +$49,298,000 AGI
| County | Returns | AGI |
|---|---|---|
| Thurston County, WA | 558 | $39,070,000 |
| Pierce County, WA | 301 | $19,516,000 |
| Cowlitz County, WA | 171 | $13,568,000 |
| King County, WA | 150 | $11,458,000 |
| Clark County, WA | 135 | $9,946,000 |
| Grays Harbor County, WA | 68 | $3,770,000 |
| Snohomish County, WA | 43 | $2,408,000 |
| Multnomah County, OR | 41 | $4,172,000 |
| Mason County, WA | 36 | $2,230,000 |
| Maricopa County, AZ | 32 | $2,073,000 |
| County | Returns | AGI |
|---|---|---|
| Thurston County, WA | 483 | $24,939,000 |
| Pierce County, WA | 168 | $8,821,000 |
| Cowlitz County, WA | 134 | $7,103,000 |
| King County, WA | 122 | $6,079,000 |
| Grays Harbor County, WA | 78 | $3,865,000 |
| Clark County, WA | 68 | $3,257,000 |
| Spokane County, WA | 35 | $1,329,000 |
| Snohomish County, WA | 32 | $2,021,000 |
| Mason County, WA | 27 | $1,721,000 |
| Pacific County, WA | 26 | $1,612,000 |
IRS migration data tracks where tax filers lived in consecutive years. A "return" is roughly a household; "AGI" is the adjusted gross income that moved with them. Net migration = inflow − outflow. Small county-pair flows are suppressed by the IRS for privacy and shown blank.
Source: IRS SOI Migration Data. License: CC0 1.0.