Chicago is a city in the state of Illinois in the United States.

Quick Scoop

  • Chicago is the largest city in Illinois and sits in the northeastern part of the state, along Lake Michigan.
  • It is not a state itself, but a city within Illinois, in Cook County, and forms the core of the wider “Chicagoland” metropolitan area that extends into Indiana and Wisconsin.

In short: if you’re wondering “Chicago which state?”, the answer is Illinois—Chicago, Illinois.

Information gathered from public forums or data available on the internet and portrayed here.