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Missouri · USPS Abbreviation

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

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Missouri's 2-letter postal abbreviation

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

Why MO?

The USPS standardized state abbreviations to 2 letters in 1963 to fit punched cards in early mail-sorting machines. The code MO takes the first 1 or 2 distinctive letters of Missouri. It is one of the famously confused 8 M-states (MA/MD/ME/MI/MN/MS/MO/MT).

Quick facts

USPS code
MO
Capital
Jefferson City
Largest city
Kansas City
Region
Midwest
Admitted to Union
1821
Nickname
Show Me State
Electoral votes
10
Bordering states
Arkansas, Iowa, Illinois, Kansas, Kentucky, Nebraska, Oklahoma, Tennessee

Other Missouri games

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

More about Missouri

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

Frequently asked

What is Missouri's abbreviation?

MO.

Is this game free?

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

Can I play other Missouri quizzes?

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