Jefferson County in numbers
- Coordinates
- 38.3005, -88.9240
- Region
- Illinois
- Country
- United States, North America
- Capital
- Washington, D.C. — 1034 km away
- Same name
- 24 more places in the world share this name
What time is it in Jefferson County, Illinois, United States
This page reports the local time in Jefferson County, Illinois, United States, set by the America/Chicago time zone (−5).
Jefferson County, United States
Sunday, 25 October 2026
UTC−5 · America/Chicago
Local time in Jefferson County
UTC−5 · daylight saving time is active
What the clock shows right now in Jefferson County.
The sun today
Sunrise 7:15 AM Solar noon 12:41 PM Sunset 6:06 PM Daylight 10 h 51 min Night 13 h 09 min Civil twilight 6:48 AM – 6:33 PM
Weather in Jefferson County right now
Loading the current weather…
Weather data by Open-Meteo, updated every 30 minutes.
Jefferson County and its neighbours
Postal codes
- 62864 Mount Vernon — 2.2 km away
- 62816 Bonnie — 11.4 km away
- 62894 Waltonville — 14.3 km away
Postal codes come from the free GeoNames dataset. Where a code is listed with a distance, it belongs to a nearby settlement — GeoNames spells that name differently from ours.
Largest cities in Illinois
Other places named Jefferson County
- Jefferson County Alabama, United States
- Jefferson County Arkansas, United States
- Jefferson County Colorado, United States
- Jefferson County Florida, United States
- Jefferson County Georgia, United States
Same time zone — America/Chicago
- Chicago United States
- Houston United States
- San Antonio United States
- Dallas United States
- Fort Worth United States
- Austin United States
Nearby places
- Mount Vernon — 2.6 km
- Webster Hill Estates — 2.8 km
- Morganville — 2.9 km
- Bakerville — 5.2 km
- Marcoe — 5.3 km
- Summersville — 5.8 km
Local time details for Jefferson County
Sunrise comes to Jefferson County at 7:15 AM and sunset at 6:06 PM today. Together that makes 10 h 51 min of light.
The same hours are kept in Jefferson County and in nearby Mount Vernon and Webster Hill Estates.
Jefferson County is mapped by 3 postal codes.
Local clocks in Jefferson County follow the America/Chicago zone, UTC−5. Do they shift for daylight saving? Yes.
Questions and answers
- How can I identify the time zone of Jefferson County?
- The time zone of Jefferson County is America/Chicago, with an offset of −5.
- Is a seasonal hour added to the clock in Jefferson County?
- Yes.
- When does light arrive in Jefferson County?
- Light arrives at 7:15 AM.