✉️ USPS CODES

Oklahoma · USPS Abbreviation

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

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Oklahoma's 2-letter postal abbreviation

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

Why OK?

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

Quick facts

USPS code
OK
Capital
Oklahoma City
Largest city
Oklahoma City
Region
South
Admitted to Union
1907
Nickname
Sooner State
Electoral votes
7
Bordering states
Arkansas, Colorado, Kansas, Missouri, New Mexico, Texas

Other Oklahoma games

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

More about Oklahoma

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

Frequently asked

What is Oklahoma's abbreviation?

OK.

Is this game free?

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

Can I play other Oklahoma quizzes?

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