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County-to-county migration · IRS SOI · filing years 2022-2023
Net migration: +452 tax returns · +411 people · +$40,339,000 AGI
| County | Returns | AGI |
|---|---|---|
| Ravalli County, MT | 322 | $17,309,000 |
| Gallatin County, MT | 167 | $8,399,000 |
| Flathead County, MT | 166 | $8,707,000 |
| Lewis and Clark County, MT | 142 | $6,953,000 |
| Lake County, MT | 125 | $6,125,000 |
| Yellowstone County, MT | 113 | $8,852,000 |
| Cascade County, MT | 93 | $6,037,000 |
| King County, WA | 79 | $9,240,000 |
| Silver Bow County, MT | 76 | $2,629,000 |
| Spokane County, WA | 59 | $4,594,000 |
| County | Returns | AGI |
|---|---|---|
| Ravalli County, MT | 326 | $22,684,000 |
| Flathead County, MT | 164 | $8,617,000 |
| Lake County, MT | 152 | $10,466,000 |
| Gallatin County, MT | 139 | $7,865,000 |
| Lewis and Clark County, MT | 133 | $7,654,000 |
| Cascade County, MT | 109 | $6,333,000 |
| Yellowstone County, MT | 96 | $7,574,000 |
| Maricopa County, AZ | 86 | $5,919,000 |
| King County, WA | 84 | $4,186,000 |
| Spokane County, WA | 73 | $4,330,000 |
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.