Idaho: state flag, capital and facts

State flag of Idaho

Idaho is a US state in the West region. Its capital is Boise, and its postal abbreviation is ID. Known as the Gem State, it joined the Union on July 3, 1890 as the 43rd state. Boise is also its largest city.

The Idaho state flag shows the state seal on a blue field above a red scroll reading "State of Idaho".

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Idaho at a glance

Capital
Boise
Largest city
Boise
Nickname
The Gem State
Statehood
July 3, 1890 (43rd state)
Region
West
Postal abbreviation
ID

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States bordering Idaho

More states in the West

Frequently asked questions

The capital of Idaho is Boise.

Idaho is in the West region of the United States.

The postal abbreviation for Idaho is ID.

Idaho is known as the Gem State.

Idaho became the 43rd state on July 3, 1890.

Idaho shares a land border with Montana, Nevada, Oregon, Utah, Washington and Wyoming.

The flag of Idaho shows the state seal on a blue field above a red scroll reading "State of Idaho".