Federal Data HubIRS Migration Flows · JSON

Williamson County, IL

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

Net migration: +105 tax returns · +305 people · $-10,528,000 AGI

Inflow
1,618 returns · 2,900 people · $84,658,000 AGI
Outflow
1,513 returns · 2,595 people · $95,186,000 AGI

Top origins (where new residents came from)

CountyReturnsAGI
Jackson County, IL277$12,936,000
Franklin County, IL258$11,487,000
Saline County, IL97$5,057,000
Johnson County, IL72$4,221,000
Union County, IL40$3,111,000
Jefferson County, IL40$1,634,000
Cook County, IL28$1,191,000
Perry County, IL26$1,353,000

Top destinations (where leavers went)

CountyReturnsAGI
Jackson County, IL239$10,069,000
Franklin County, IL212$9,773,000
Saline County, IL74$3,394,000
Johnson County, IL67$4,549,000
St. Clair County, IL39$2,296,000
Jefferson County, IL31$1,607,000
St. Louis County, MO30$1,698,000
Union County, IL29$2,141,000
Perry County, IL28$1,620,000
Cook County, IL27$1,665,000

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.