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County-to-county migration · IRS SOI · filing years 2022-2023
Net migration: +344 tax returns · +140 people · +$58,693,000 AGI
| County | Returns | AGI |
|---|---|---|
| Yellowstone County, MT | 217 | $13,565,000 |
| Park County, MT | 155 | $11,465,000 |
| Missoula County, MT | 139 | $7,865,000 |
| King County, WA | 120 | $15,269,000 |
| Lewis and Clark County, MT | 120 | $5,903,000 |
| Flathead County, MT | 100 | $6,337,000 |
| Cascade County, MT | 77 | $3,960,000 |
| Los Angeles County, CA | 66 | $6,907,000 |
| San Diego County, CA | 65 | $9,863,000 |
| Madison County, MT | 61 | $3,834,000 |
| County | Returns | AGI |
|---|---|---|
| Yellowstone County, MT | 239 | $14,622,000 |
| Park County, MT | 184 | $37,917,000 |
| Missoula County, MT | 167 | $8,399,000 |
| Flathead County, MT | 137 | $8,175,000 |
| Lewis and Clark County, MT | 134 | $7,550,000 |
| King County, WA | 117 | $8,991,000 |
| Broadwater County, MT | 107 | $10,022,000 |
| Cascade County, MT | 100 | $5,256,000 |
| Madison County, MT | 99 | $6,496,000 |
| Maricopa County, AZ | 89 | $6,917,000 |
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.