Current Time in Illinois

Central Time (CT) · CST (UTC−6) in winter · CDT (UTC−5) during Daylight Saving Time

Current Time in Illinois
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CST · UTC-6Central TimeThe Prairie State

Illinois Time Facts

Time Zone
CT — Central Time (UTC-6/UTC-5)
DST Rule
2nd Sunday Mar → 1st Sunday Nov
IANA Identifier
America/Chicago
Population
~12.6 million — 6th largest US state
Chicago GDP
$770B+ — 3rd largest US metro economy
Famous For
Chicago, deep dish pizza, Obama, blues

Chicago Time — The Central Time Capital

Chicago is the de facto capital of Central Time. The CME Group (Chicago Mercantile Exchange) — the world's largest derivatives marketplace — opens at 8:30 AM CT. Futures markets for corn, soybeans, cattle, and Treasury bonds are priced on Chicago time, making CT the world's agricultural and derivatives clock.

Illinois is 1 hour behind New York and 2 hours ahead of California, placing it at the geographic center of the US timezone spectrum. This makes Chicago a natural meeting-time compromise — when it's 10 AM in Chicago, it's 11 AM in NYC and 8 AM in LA.

O'Hare International Airport (ORD) was the world's busiest airport for decades and remains a major hub for United and American Airlines. Its Central Time location makes it the ideal connection point between East Coast and West Coast flights.

Major Illinois Cities — All on CT

Chicago
Pop. 2.7M
3rd largest US city, deep dish, blues
Aurora
Pop. 180K
2nd largest, Fox River, Wayne's World
Naperville
Pop. 150K
Top suburb, tech corridor
Rockford
Pop. 145K
Manufacturing, aerospace
Springfield
Pop. 115K
State capital, Lincoln's home
Peoria
Pop. 110K
Caterpillar HQ, "Will it play in Peoria?"

Frequently Asked Questions

What time is it in Illinois right now?
Illinois uses Central Time — CST (UTC−6) in winter and CDT (UTC−5) during Daylight Saving Time. All cities in Illinois — Chicago, Springfield, Rockford, Peoria, Champaign, and Aurora — are on the same time zone. The live clock above shows the current time in Illinois.
What time zone is Illinois in?
Illinois is in the Central Time Zone. In winter, Illinois uses Central Standard Time (CST, UTC−6). During Daylight Saving Time (March–November), Illinois uses Central Daylight Time (CDT, UTC−5). The IANA identifier is America/Chicago. Illinois shares the Central Time Zone with Texas, Minnesota, Wisconsin, Missouri, Iowa, and most of the central United States.
What is the time difference between Illinois and New York?
New York (Eastern Time) is always 1 hour ahead of Illinois (Central Time). When it is 9:00 AM in Chicago, it is 10:00 AM in New York. Both states switch to Daylight Saving Time on the same dates, so the 1-hour gap is constant year-round.
What is the time difference between Illinois and California?
Illinois (Central Time) is always 2 hours ahead of California (Pacific Time). When it is 7:00 AM in Los Angeles, it is 9:00 AM in Chicago. Both states switch to Daylight Saving Time on the same dates, so the 2-hour gap is constant year-round.
What is the time difference between Illinois and London?
Chicago (CST, UTC−6) is 6 hours behind London (GMT, UTC+0) in winter. During US and UK Daylight Saving Time (when both switch, roughly April–October), Chicago (CDT, UTC−5) is typically 6 hours behind London (BST, UTC+1). There are brief transition windows each spring and autumn when the gap temporarily becomes 5 or 7 hours, because the US and UK switch clocks on different dates.
Does Illinois observe Daylight Saving Time?
Yes. Illinois observes Daylight Saving Time. Clocks spring forward 1 hour on the second Sunday in March (CST to CDT) and fall back on the first Sunday in November (CDT to CST). As of 2026, Illinois continues to observe DST, though there have been various state legislative discussions about ending the clock-change practice.
What is the best time to call Chicago from Europe?
Chicago business hours (9:00 AM – 6:00 PM CST) correspond to 3:00 PM – Midnight GMT in London, or 4:00 PM – 1:00 AM CET in Berlin and Paris. This means European callers should phone Chicago in the early-to-mid afternoon local time to reach colleagues during standard Chicago business hours. Morning calls from Europe will arrive before Chicago opens for business.

Related Time Pages

New York timeTime in MichiganTime in IndianaTime in WisconsinTime in OhioChicago timeTime in MissouriTime converter tool
Time zone data powered by the IANA Time Zone Database. Illinois: America/Chicago (CST UTC−6 / CDT UTC−5).