✉️ USPS CODES

Illinois · USPS Abbreviation

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

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Illinois's 2-letter postal abbreviation

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

Why IL?

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

Quick facts

USPS code
IL
Capital
Springfield
Largest city
Chicago
Region
Midwest
Admitted to Union
1818
Nickname
Prairie State
Electoral votes
19
Bordering states
Indiana, Iowa, Kentucky, Missouri, Wisconsin

Other Illinois games

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

More about Illinois

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

Frequently asked

What is Illinois's abbreviation?

IL.

Is this game free?

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

Can I play other Illinois quizzes?

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