Most of Texas operates on Central Time, but if you're calling someone in El Paso or planning a cross-state road trip, you're dealing with two different zones. Because the Lone Star State spans roughly 800 miles from east to west, it doesn't fit neatly into a single clock.
Knowing whether Houston, Dallas, Austin, or El Paso dictates your schedule prevents missed flights and botched phone calls. This breakdown covers Texas time zones, how Daylight Saving Time shifts the clock, and the exceptions you need to know.
The Two Texas Time Zones
Texas is split across two separate time zones: Central Time and Mountain Time. The vast majority of the state runs on Central Time, while a small pocket in the far western corner uses Mountain Time.
Central Time Zone (CT)
Roughly 95 percent of Texas lives in the Central Time Zone. Major population centers like Houston, Dallas-Fort Worth, Austin, San Antonio, Corpus Christi, and Lubbock all share this clock.
- Standard Time (CST): UTC-6 ( observed from early November to mid-March ).
- Daylight Saving Time (CDT): UTC-5 ( observed from mid-March to early November ).
Mountain Time Zone (MT)
Only a tiny fraction of the state's western edge stays one hour behind the rest of Texas.
- Standard Time (MST): UTC-7.
- Daylight Saving Time (MDT): UTC-6.
Which Texas Counties Use Mountain Time?
You won't find Mountain Time anywhere near the center or north of the state. It's strictly confined to the far western border wedged against New Mexico and Old Mexico.
The exact boundaries include:
- El Paso County: This includes the city of El Paso and its immediate suburbs, which share a metroplex and daily economy with Ciudad Juárez, Mexico.
- Hudspeth County: Directly east of El Paso County, towns like Dell City and Sierra Blanca operate on Mountain Time.
- Culberson County (Partial): While most of Culberson County (including Van Horn) uses Central Time, the northwestern corner encompassing parts of the Guadalupe Mountains National Park unofficially or locally leans into Mountain Time due to its proximity to New Mexico.
If you drive east out of El Paso on Interstate 10, you cross the time zone boundary near the Hudspeth County line, where your phone automatically springs or falls back an hour.
Daylight Saving Time in Texas
Like most of the United States, Texas observes Daylight Saving Time (DST). Clocks shift forward by one hour on the second Sunday in March and drop back by one hour on the first Sunday in November.
Because both Central and Mountain zones in Texas observe DST, the one-hour gap between El Paso and the rest of the state remains constant year-round. When it's 2:00 PM in Dallas, it's always 1:00 PM in El Paso, whether you're visiting in July or January.
According to the National Institute of Standards and Technology, maintaining synchronized shifts within state lines helps minimize logistical confusion for interstate commerce, though border towns like El Paso constantly coordinate across international lines with Mexico, which has historically adjusted its DST rules differently.
Common Mistakes and Travel Tips
Crossing or calling across Texas time zones catches travelers off guard. Keep these practical points in mind:
- Assuming state borders mean single time zones: Travelers assume a large state like Texas has a uniform clock. Crossing from San Antonio to El Paso requires adjusting your watch backward by an hour.
- Flight departures: If you fly out of El Paso International Airport (ELP) to Dallas/Fort Worth International Airport (DFW), pay close attention to your ticket arrival times. Connecting flights account for the shift, but human error causes missed gates.
- Border crossers: El Paso sits directly on the border of New Mexico and Mexico. New Mexico is entirely in the Mountain Time Zone, making travel west seamless, but heading east toward Midland-Odessa drops you straight into Central Time.
To verify the exact second in any Texas county, check a reliable live tracker like the U.S. Naval Observatory or standard synchronized time tools.
Frequently Asked Questions
Does all of El Paso County observe Mountain Time?
Yes. Every city, town, and unincorporated area within El Paso County operates on Mountain Time.
Why doesn't Texas use a single time zone?
Time zones follow geographic and economic ties rather than state lines. El Paso is geographically much closer to Albuquerque, New Mexico, and Phoenix, Arizona, than it is to Houston or Dallas, making Mountain Time a natural fit for commerce and daily life in the borderlands.
Do parts of the Texas Panhandle use Mountain Time?
Not anymore. While parts of the Panhandle briefly experimented with Mountain Time in the early 1920s, the entire region has long since settled firmly into the Central Time Zone.
How far is the time difference between Houston and El Paso?
El Paso is always one hour behind Houston. When it is noon in Houston, it is 11:00 AM in El Paso.
