What was Chicago's estimated population in July 2025?
Answer2,731,585
That's down 0.6% from the 2020 census count of 2,746,388.
Source: U.S. Census Bureau, QuickFacts (2025) census.gov
Places · Facts & sources
Chicago facts & stats
5 sourced facts about Chicago, Illinois, each with the context behind the number. 4 more are in today's round and appear here after it closes.
The basics
Going deeper
What share of Chicago residents were born outside the United States?
Answer20.9%
Hispanic or Latino residents make up 29.7% of the city's population, per Census estimates.
Source: U.S. Census Bureau, QuickFacts (2024) census.gov
In 2025, O'Hare averaged one takeoff or landing about every how many seconds?
AnswerEvery 37 seconds
Its 860,015 aircraft operations made O'Hare the world's busiest airfield, a title it last held in 2019.
Source: City of Chicago, Office of the Mayor (2025) chicago.gov
From the Willis Tower Skydeck on the 103rd floor, you can see into up to how many states?
AnswerFour states, up to 50 miles
The 110-story tower stands 1,450 feet tall and opened in 1974.
Source: Skydeck Chicago theskydeck.com
Expert level
About how many people per square mile lived in Chicago in 2020?
Answer12,059.8
About 2.75 million people shared 227.73 square miles of land at the 2020 census.
Source: U.S. Census Bureau, QuickFacts (2020) census.gov
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