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County-to-county migration · IRS SOI · filing years 2022-2023
Net migration: +222 tax returns · +595 people · +$61,074,000 AGI
| County | Returns | AGI |
|---|---|---|
| Missoula County, MT | 326 | $22,684,000 |
| Gallatin County, MT | 33 | $1,579,000 |
| San Diego County, CA | 31 | $5,532,000 |
| Orange County, CA | 30 | $5,017,000 |
| King County, WA | 29 | $3,249,000 |
| Flathead County, MT | 27 | $2,429,000 |
| Kootenai County, ID | 25 | $2,998,000 |
| Los Angeles County, CA | 25 | $2,757,000 |
| Spokane County, WA | 23 | $1,801,000 |
| Snohomish County, WA | 22 | $2,071,000 |
| County | Returns | AGI |
|---|---|---|
| Missoula County, MT | 322 | $17,309,000 |
| Gallatin County, MT | 37 | $1,438,000 |
| Lewis and Clark County, MT | 21 | $1,387,000 |
| King County, WA | 20 | $1,411,000 |
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.