United States
Time now in Cook County
Sunrise 06:04Sunset 07:42Time zone UTC −5
Time zone
America/Chicago
UTC offset
UTC −5
Daylight saving
In effect now
Population
5,194,675
Sunrise
06:04
Sunset
07:42
Day length
13h 38m
Coordinates
41.90, -87.65
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
Sunrise today lands at 06:04 and sunset at 07:42 local time, giving 13h 38m of daylight. Those figures come from the city's own coordinates (41.90, -87.65) rather than a country-wide average, so they match what you would actually see from a window in Cook County.
If you are coordinating from another country, the shortcut is the working window: a normal Cook County day of 09:00–17:00 falls between 14:00–22:00 UTC. Convert your own hours into UTC once and you can tell at a glance whether someone there is likely to be at their desk.
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.
Frequently asked questions about time in Cook County
- 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.
- Does Cook County change its clocks for daylight saving?
- Yes, and it is in effect now. Clocks change again on 1 November 2026.
- When do the sun rise and set in Cook County today?
- Sunrise is at 06:04 and sunset at 07:42, giving 13h 38m of daylight.
- 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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