Idaho local data guide

Does all of Idaho observe the same time zone?

No, Idaho does not observe a single time zone. The state is divided between the Mountain Time Zone and the Pacific Time Zone, with the majority of the state, including Boise and the eastern/southern regions, operating on Mountain Time, while the northern Panhandle operates on Pacific Time.

Updated with grounded research as of 2026-11-09.

The short answer

Idaho is split between two time zones: the Mountain Time Zone and the Pacific Time Zone. This split is critical for residents and businesses operating across state lines or planning travel, as the northern "Panhandle" region follows a different time standard than the southern and central parts of the state.

Key facts

Time Zone Split
Idaho is divided into two time zones: the Mountain Time Zone (most of the state) and the Pacific Time Zone (the northern Panhandle).
Daylight Saving Time
All locations throughout the entire state of Idaho observe Daylight Saving Time.
Geographic Divide
The boundary generally aligns with the southern border of Idaho County, with the Panhandle (including cities like Coeur d'Alene, Moscow, and Lewiston) in the Pacific Time Zone, while the rest of the state is in Mountain Time.

Understanding the Geographic Split

When moving to or traveling within Idaho, it is important to know which region you are in. The divide is not a straight line but follows county boundaries. Generally, the Idaho Panhandle—which includes counties such as Boundary, Bonner, Kootenai, Benewah, and Shoshone, as well as parts of Idaho County—operates on Pacific Time (PT).

The vast majority of the state, including major population centers like Boise, Idaho Falls, Twin Falls, and Pocatello, operates on Mountain Time (MT). This is one hour ahead of the Pacific Time Zone.

The Salmon River and Local Landmarks

The Salmon River serves as a significant geographic marker in the time zone transition. Near the town of Riggins, the Salmon River is often cited as the dividing line. In fact, there is a location known as the 'Time Zone Bridge' where it is possible to stand on the bridge and be in two different time zones simultaneously.

If you are planning logistics between these regions—such as scheduling meetings between Lewiston and Boise—always verify the local time, as the one-hour difference can impact transit planning and business operations.

Daylight Saving Time Observance

Unlike some states that have explored opting out of time changes, Idaho uniformly observes Daylight Saving Time across both zones.

When the clocks change in the spring and fall, the transition happens at the designated local time for both the Mountain and Pacific zones. This ensures that while there is an offset between the two regions, they remain synchronized in their observation of the time-shift schedule.

Common questions

Which major cities are in the Pacific Time Zone?

The Pacific Time Zone in Idaho primarily covers the northern Panhandle. Key cities include Coeur d'Alene, Moscow, Lewiston, and Sandpoint.

Are Boise and Sun Valley in the same time zone?

Yes, both Boise and Sun Valley are located in the Mountain Time Zone, which covers the majority of southern and central Idaho.

Does the time zone difference affect my commute if I live in the Panhandle and work elsewhere?

If you live in the Pacific Time Zone (the Panhandle) and commute to a job in the Mountain Time Zone (the rest of the state), you will experience a one-hour time difference, which is a significant factor in daily scheduling and travel planning.

Related Idaho questions

  • What counties in Idaho are in the Pacific Time Zone?
  • How do I adjust for the time difference when traveling from Boise to Coeur d'Alene?
  • Does the Idaho government observe standard time year-round?

Sources and verification