✉️ USPS CODES

South Dakota · USPS Abbreviation

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

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South Dakota's 2-letter postal abbreviation

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

Why SD?

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

Quick facts

USPS code
SD
Capital
Pierre
Largest city
Sioux Falls
Region
Midwest
Admitted to Union
1889
Nickname
Mount Rushmore State
Electoral votes
3
Bordering states
Iowa, Minnesota, Montana, Nebraska, North Dakota, Wyoming

Other South Dakota games

→ South Dakota · Place the State→ South Dakota · State Capitals Quiz→ South Dakota · State Flag Quiz→ South Dakota · State Nickname Quiz

More about South Dakota

→ South Dakota state page → Learn the 50 US states → All US states games

Frequently asked

What is South Dakota's abbreviation?

SD.

Is this game free?

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

Can I play other South Dakota quizzes?

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