Time Zones
Mountain Time Zone States 2026
Mountain Time Zone
Full
Partial
No
State | Mountain Time Zone↑ | Time Zones | |
|---|---|---|---|
 | Arizona | Full | Mountain Time Zone |
 | Colorado | Full | Mountain Time Zone |
 | Montana | Full | Mountain Time Zone |
 | New Mexico | Full | Mountain Time Zone |
 | Utah | Full | Mountain Time Zone |
 | Wyoming | Full | Mountain Time Zone |
 | Idaho | Partial | Mountain Time Zone, Pacific Time Zone |
 | Kansas | Partial | Central Time Zone, Mountain Time Zone |
 | Nebraska | Partial | Central Time Zone, Mountain Time Zone |
 | Nevada | Partial | Pacific Time Zone, Mountain Time Zone |
 | North Dakota | Partial | Central Time Zone, Mountain Time Zone |
 | Oregon | Partial | Pacific Time Zone, Mountain Time Zone |
 | South Dakota | Partial | Central Time Zone, Mountain Time Zone |
 | Texas | Partial | Central Time Zone, Mountain Time Zone |
 | Alabama | No | Central Time Zone |
 | Alaska | No | Alaska Time Zone, Hawaii-Aleutian Time Zone. Town of Hyder unofficially follows Pacific time. |
 | Arkansas | No | Central Time Zone |
 | California | No | Pacific Time Zone |
 | Connecticut | No | Eastern Time Zone |
 | Delaware | No | Eastern Time Zone |
 | Florida | No | Eastern Time Zone, Central Time Zone |
 | Georgia | No | Eastern Time Zone |
 | Hawaii | No | Hawaii-Aleutian Time Zone |
 | Illinois | No | Central Time Zone |
 | Indiana | No | Eastern Time Zone, Central Time Zone |
 | Iowa | No | Central Time Zone |
 | Kentucky | No | Eastern Time Zone, Central Time Zone |
 | Louisiana | No | Central Time Zone |
 | Maine | No | Eastern Time Zone |
 | Maryland | No | Eastern Time Zone |
 | Massachusetts | No | Eastern Time Zone |
 | Michigan | No | Eastern Time Zone, Central Time Zone |
 | Minnesota | No | Central Time Zone |
 | Mississippi | No | Central Time Zone |
 | Missouri | No | Central Time Zone |
 | New Hampshire | No | Eastern Time Zone |
 | New Jersey | No | Eastern Time Zone |
 | New York | No | Eastern Time Zone |
 | North Carolina | No | Eastern Time Zone |
 | Ohio | No | Eastern Time Zone |
 | Oklahoma | No | Central Time Zone |
 | Pennsylvania | No | Eastern Time Zone |
 | Rhode Island | No | Eastern Time Zone |
 | South Carolina | No | Eastern Time Zone |
 | Tennessee | No | Eastern Time Zone, Central Time Zone |
 | Vermont | No | Eastern Time Zone |
 | Virginia | No | Eastern Time Zone |
 | Washington | No | Pacific Time Zone |
 | West Virginia | No | Eastern Time Zone |
 | Wisconsin | No | Central Time Zone |
Mountain Time Zone A U.S. time zone that is typically 7 hours behind Coordinated Universal Time (UTC−7) during standard time.
Partial Time Zone Coverage A situation where only part of a state observes a specific time zone while the rest follows another.
States Fully in the Mountain Time Zone
Some U.S. states are located entirely within the Mountain Time Zone, meaning all regions of the state observe the same standard time without internal variation. These states do not span multiple time zones.
States fully in the Mountain Time Zone include Arizona, Colorado, Montana, New Mexico, Utah, and Wyoming. In these states, timekeeping is consistent statewide, simplifying scheduling, transportation, and coordination across regions.
States Partially in the Mountain Time Zone
Some states are divided between the Mountain Time Zone and another time zone, meaning only certain regions observe Mountain Time while the rest follow a different standard time. These divisions are typically based on geographic, economic, or administrative boundaries.
States partially in the Mountain Time Zone include Idaho, Kansas, Nebraska, Nevada, North Dakota, Oregon, South Dakota, and Texas. These states are split between Mountain Time and either the Pacific or Central Time Zone, which can create variations in local timekeeping within the same state.
States in Both Mountain and Pacific Time Zones
Some states are divided between the Mountain Time Zone and the Pacific Time Zone, with different regions observing different standard times. These divisions are typically found in western states where geographic boundaries align with time zone transitions.
States that observe both Mountain and Pacific Time include Idaho, Nevada, and Oregon. In these states, different regions observe different time zones depending on their geographic location within the state.
States in Both Mountain and Central Time Zones
Some states are divided between the Mountain Time Zone and the Central Time Zone, with different regions observing different standard times. These divisions are more common in central U.S. states where time zone boundaries run north to south.
States that observe both Mountain and Central Time include Kansas, Nebraska, North Dakota, South Dakota, and Texas. In these states, western regions typically follow Mountain Time, while eastern regions observe Central Time.
