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County-to-county migration · IRS SOI · filing years 2022-2023
Net migration: +236 tax returns · +299 people · +$51,248,000 AGI
| County | Returns | AGI |
|---|---|---|
| Snohomish County, WA | 706 | $55,877,000 |
| Whatcom County, WA | 498 | $36,102,000 |
| King County, WA | 457 | $57,550,000 |
| Island County, WA | 242 | $15,203,000 |
| Pierce County, WA | 66 | $4,067,000 |
| Maricopa County, AZ | 57 | $4,451,000 |
| Spokane County, WA | 52 | $4,591,000 |
| San Juan County, WA | 41 | $3,369,000 |
| Los Angeles County, CA | 41 | $2,190,000 |
| San Diego County, CA | 37 | $3,397,000 |
| County | Returns | AGI |
|---|---|---|
| Snohomish County, WA | 607 | $40,855,000 |
| Whatcom County, WA | 450 | $27,348,000 |
| King County, WA | 276 | $23,879,000 |
| Island County, WA | 208 | $14,778,000 |
| Pierce County, WA | 72 | $4,534,000 |
| Maricopa County, AZ | 65 | $6,215,000 |
| Spokane County, WA | 47 | $3,039,000 |
| San Diego County, CA | 44 | $4,082,000 |
| Los Angeles County, CA | 37 | $1,960,000 |
| Kitsap County, WA | 36 | $1,662,000 |
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.