From 2019 to 2025, McHenry County rose fastest of the six counties and Cook County slowest.

Cook against the collar counties

Cook County rose 42.9% from 2019 to 2025 while the five collar counties gained between 47.7% and 60.4%.

Inside Chicago

Inside the city, neighborhoods moved at very different speeds, and the two at its center barely moved at all. The next level of this deep dive charts them.