Federal Data Hub › IRS Migration Flows · JSON

Jefferson County, MT

County-to-county migration · IRS SOI · filing years 2022-2023

Net migration: +82 tax returns · +232 people · +$14,390,000 AGI

Inflow
496 returns · 947 people · $40,084,000 AGI
Outflow
414 returns · 715 people · $25,694,000 AGI

Top origins (where new residents came from)

CountyReturnsAGI
Lewis and Clark County, MT133$14,351,000
Gallatin County, MT70$4,408,000
Silver Bow County, MT25$1,332,000

Top destinations (where leavers went)

CountyReturnsAGI
Lewis and Clark County, MT127$9,027,000
Gallatin County, MT38$1,956,000
Silver Bow County, MT29$1,318,000

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.