Current Time in O'Fallon, Missouri, United States
5:02:51 AM CDT
Thursday, April 2, 2026
Time Zone Details
- IANA Zone
- America/Chicago
- Time Zone
- CDT
- GMT Offset
- GMT-5
- Daylight Saving Time
- CST starts on Nov 1, 2026
- Country
- United States
- Est. Population
- ~85K people
Other Cities in This Time Zone
Frequently Asked Questions
- What time is it in O'Fallon right now?
- The current time in O'Fallon is 5:02 AM CDT (GMT-5). Use the interactive converter on this page to compare O'Fallon with other cities.
- Does O'Fallon observe daylight saving time?
- Yes, O'Fallon is currently observing daylight saving time (CDT). Clocks will return to standard time (CST) on Nov 1, 2026.
- What is the GMT offset for O'Fallon?
- O'Fallon is at GMT-5 (CDT). The IANA timezone identifier is America/Chicago.