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County-to-county migration · IRS SOI · filing years 2022-2023
Net migration: +1,142 tax returns · +1,600 people · +$81,951,000 AGI
| County | Returns | AGI |
|---|---|---|
| Pierce County, WA | 2,030 | $136,781,000 |
| King County, WA | 1,085 | $93,532,000 |
| Lewis County, WA | 483 | $24,939,000 |
| Mason County, WA | 361 | $19,196,000 |
| Grays Harbor County, WA | 320 | $19,594,000 |
| Snohomish County, WA | 268 | $20,587,000 |
| Clark County, WA | 153 | $10,021,000 |
| Maricopa County, AZ | 137 | $10,235,000 |
| Kitsap County, WA | 133 | $8,571,000 |
| Spokane County, WA | 131 | $6,449,000 |
| County | Returns | AGI |
|---|---|---|
| Pierce County, WA | 1,623 | $99,866,000 |
| King County, WA | 861 | $58,055,000 |
| Lewis County, WA | 558 | $39,070,000 |
| Mason County, WA | 366 | $24,227,000 |
| Grays Harbor County, WA | 319 | $21,609,000 |
| Maricopa County, AZ | 193 | $13,524,000 |
| Snohomish County, WA | 183 | $12,746,000 |
| Clark County, WA | 156 | $10,836,000 |
| Kitsap County, WA | 150 | $9,434,000 |
| Spokane County, WA | 148 | $8,973,000 |
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.