✉️ USPS CODES

Idaho · USPS Abbreviation

Launch the USPS Abbreviation mini-game with Idaho as the first prompt. Quick facts and links below.

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Idaho's 2-letter postal abbreviation

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ID is the official USPS 2-letter abbreviation for Idaho. This page launches the USPS Abbreviations quiz starting with ID — match the code to the state.

Why ID?

The USPS standardized state abbreviations to 2 letters in 1963 to fit punched cards in early mail-sorting machines. The code ID takes the first 1 or 2 distinctive letters of Idaho.

Quick facts

USPS code
ID
Capital
Boise
Largest city
Boise
Region
West
Admitted to Union
1890
Nickname
Gem State
Electoral votes
4
Bordering states
Montana, Nevada, Oregon, Utah, Washington, Wyoming

Other Idaho games

→ Idaho · Place the State→ Idaho · State Capitals Quiz→ Idaho · State Flag Quiz→ Idaho · State Nickname Quiz

More about Idaho

→ Idaho state page → Learn the 50 US states → All US states games

Frequently asked

What is Idaho's abbreviation?

ID.

Is this game free?

Yes — 100% free, no signup, no ads. Just play.

Can I play other Idaho quizzes?

Yes — see the sibling games above. Idaho appears in every Statedoku mini-game.