Northern Illinois

Northern Illinois
Chicago, Illinois
Chicago, Illinois
Counties that are colored red are considered a part of the Northern Illinois region.
Counties that are colored red are considered a part of the Northern Illinois region.
Country United States
State Illinois
Largest cityChicago
Population
9.7 million

Northern Illinois is a region generally covering the northern third of the U.S. state of Illinois.[1][2] The region is by far the most populous of Illinois, with nearly 9.7 million residents as of 2010.

  1. ^ "Regions of Illinois". Illinois Department of Natural Resources. Retrieved 4 October 2013.
  2. ^ "Illinois Regions". Illinois Environmental Protection Agency. Retrieved 4 October 2013.