Who's moving to Illinois
Where households are arriving from and leaving for, county by county — built on official federal tax-filer data, not marketing estimates.
544,966 households moved in or out · #10 busiest moving market in the U.S.-28,686 net households — For every 100 households that arrived from another state, about 125 left. Illinois is a net loser to other states. That loss has narrowed by 31% over five years. Another 2,068 households arrived from abroad.
Gained households from other states
Lost households to other states
Circle size — households that moved in or out.
Chicago · Cook County — the busiest moving market in Illinois.
Households arriving in Illinois from another state report $79,037 in average annual income; those leaving for another state report $104,809. Departures out-earn arrivals — Illinois is losing its higher earners.
How this works: IRS SOI County-to-County Migration Data, 2022-2023. The IRS compares the address on consecutive tax returns, so every move here is a real filed household. The headline figures and county lists count moves that crossed a state line; the five-year chart counts every move, including from abroad. The data publishes annually with about a two-year lag, misses people who don't file a return, and leaves 25% of moves unattributed to a specific county, because flows too small to publish are grouped into regional buckets. 102 of Illinois's counties have published data.