Federal Data Hub › IRS Migration Flows · JSON
County-to-county migration · IRS SOI · filing years 2022-2023
Net migration: +652 tax returns · +1,288 people · +$120,616,000 AGI
| County | Returns | AGI |
|---|---|---|
| Missoula County, MT | 164 | $8,617,000 |
| Gallatin County, MT | 137 | $8,175,000 |
| Lake County, MT | 125 | $8,403,000 |
| Lincoln County, MT | 83 | $6,590,000 |
| King County, WA | 82 | $14,965,000 |
| Los Angeles County, CA | 77 | $12,349,000 |
| San Diego County, CA | 70 | $9,789,000 |
| Maricopa County, AZ | 66 | $6,678,000 |
| Spokane County, WA | 62 | $3,115,000 |
| Orange County, CA | 57 | $12,447,000 |
| County | Returns | AGI |
|---|---|---|
| Missoula County, MT | 166 | $8,707,000 |
| Lincoln County, MT | 122 | $7,905,000 |
| Lake County, MT | 118 | $10,176,000 |
| Gallatin County, MT | 100 | $6,337,000 |
| Maricopa County, AZ | 68 | $8,390,000 |
| King County, WA | 49 | $7,411,000 |
| Lewis and Clark County, MT | 43 | $2,419,000 |
| Cascade County, MT | 42 | $2,202,000 |
| Spokane County, WA | 40 | $1,919,000 |
| Clark County, NV | 39 | $3,134,000 |
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.