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County-to-county migration · IRS SOI · filing years 2022-2023
Net migration: +306 tax returns · +443 people · +$17,386,000 AGI
| County | Returns | AGI |
|---|---|---|
| Gallatin County, MT | 239 | $14,622,000 |
| Carbon County, MT | 114 | $6,659,000 |
| Stillwater County, MT | 111 | $7,780,000 |
| Missoula County, MT | 96 | $7,574,000 |
| Big Horn County, MT | 93 | $4,336,000 |
| Maricopa County, AZ | 89 | $6,026,000 |
| Cascade County, MT | 85 | $4,722,000 |
| Lewis and Clark County, MT | 79 | $4,950,000 |
| Musselshell County, MT | 57 | $1,967,000 |
| King County, WA | 52 | $5,652,000 |
| County | Returns | AGI |
|---|---|---|
| Gallatin County, MT | 217 | $13,565,000 |
| Carbon County, MT | 121 | $6,902,000 |
| Missoula County, MT | 113 | $8,852,000 |
| Maricopa County, AZ | 95 | $7,359,000 |
| Stillwater County, MT | 91 | $6,566,000 |
| Lewis and Clark County, MT | 82 | $6,619,000 |
| Big Horn County, MT | 79 | $2,873,000 |
| Cascade County, MT | 69 | $2,878,000 |
| King County, WA | 52 | $2,660,000 |
| Rosebud County, MT | 45 | $2,043,000 |
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.