United States
Time now in Cook County
Sunday, 23 August 2026
Sunrise 06:08Sunset 08:01Time zone UTC −5
Time zone
America/Chicago
UTC offset
UTC −5
Daylight saving
In effect now
Population
5,617
Sunrise
06:08
Sunset
08:01
Day length
13h 53m
Coordinates
47.82, -90.54
Time difference from Cook County
Hours ahead (right) or behind (left) Cook County right now.
Cook County on the map
About the time in Cook County
The zone identifier America/Chicago is the value you want in code, calendars and travel systems. Abbreviations change with the season, but America/Chicago keeps pointing at Chicago time whatever the date, which is why every timestamp on this page is built from it.
Cook County runs on America/Chicago, which puts the city UTC −5 from Coordinated Universal Time right now. The clock at the top of this page is not copied from your device: it is anchored to our reference timestamp and re-rendered every second against the IANA time zone database, so it stays right even when a laptop or phone has quietly drifted.
Cook County is on daylight saving time at the moment, which is why the offset reads UTC −5 instead of its winter value. Clocks go back on 1 November 2026, and anything scheduled across that date shifts by an hour.
Frequently asked questions about time in Cook County
- When do the sun rise and set in Cook County today?
- Sunrise is at 06:08 and sunset at 08:01, giving 13h 53m of daylight.
- Does Cook County change its clocks for daylight saving?
- Yes, and it is in effect now. Clocks change again on 1 November 2026.
- Is the clock on this page accurate?
- It is synchronised with our server rather than your device, then formatted for America/Chicago, so a drifting device clock does not affect what you see.
- What time is it in Cook County right now?
- The live clock above shows the current time in Cook County, updating every second from America/Chicago (UTC −5).
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