Northern Illinois

This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Northern Illinois" – news · newspapers · books · scholar · JSTOR (October 2013) (Learn how and when to remove this message)

Northern Illinois
Region of Illinois
Chicago, Illinois
Counties that are colored red are considered a part of the Northern Illinois region
Country	United States
State	Illinois
Largest city	Chicago
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.