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South Dakota Zip Codes



South Dakota South Dakota is a state located in the Midwestern region of the United States. It is named after the Lakota and Dakota Sioux American Indian tribes. South Dakota is the 17th most extensive, but the 5th least populous and the 5th least densely populated of the 50 United States. Once the southern portion of the Dakota Territory, South Dakota became a state on November 2, 1889. Pierre is the state capital and Sioux Falls, with a population of 153,000, is South Dakota s largest city.

State Zip Code City County Area Codes
SD 57269 Twin Brooks Grant County 605
SD 57270 Veblen Marshall County 605, 701
SD 57271 Vienna Clark County 605
SD 57272 Wallace Codington County 605
SD 57273 Waubay Day County 605
SD 57274 Webster Day County 605
SD 57276 White Brookings County 605
SD 57278 Willow Lake Clark County 605
SD 57279 Wilmot Roberts County 320, 605
SD 57301 Mitchell Davison County 605
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Map of South Dakota

ZIP codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP, an acronym for Zone Improvement Plan, is properly written in capital letters and was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the code in the postal address. The basic format consists of five decimal numerical digits. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the ZIP code, a hyphen, and four more digits that determine a more precise location than the ZIP code alone. The term ZIP code was originally registered as a servicemark (a type of trademark) by the U.S. Postal Service, but its registration has since expired.

ZIP codes designate only delivery points within the United States and its dependencies, as well as locations of its armed forces. There are no ZIP codes reserved for designating mail bound for foreign destinations (with the exception of U.S. military units stationed outside of the United States), and therefore, international outbound mail should not include a ZIP code in the delivery address. The last line of a foreign address must only show the name of the country of destination.

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