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South Dakota ZIP codes

All 385 ZIPs in South Dakota, 57001 to 57799. Tap one on the map or in the list.

385

ZIP codes

906,188

people live in them

66

counties

10

PO Box & no-area ZIPs

Most people

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All 385 South Dakota ZIP codes

ZIP codes by county

Pick a county for its ZIP list and map. Counts include ZIPs that only partly reach into the county.

Questions people actually ask

How many ZIP codes are in South Dakota?

385 ZIP codes are in use in South Dakota. 375 cover a delivery area, and 10 are PO Box, single-building or organization ZIPs with no area of their own.

What do South Dakota ZIP codes start with?

South Dakota ZIP codes start with these three-digit prefixes: 570–577. Each prefix is a mail sorting area run from one processing center.

Which South Dakota ZIP code has the most people?

57106 in Sioux Falls has the most residents of any South Dakota ZIP, about 51,907 people in the Census Bureau’s ACS 2020–2024 estimates.

Which South Dakota county has the most ZIP codes?

Minnehaha County touches 29 ZIP codes, the most of the 66 counties in South Dakota. 203 South Dakota ZIPs reach into more than one county.

Are these the official USPS ZIP code boundaries?

The map uses Census ZIP Code Tabulation Areas, the standard public stand-in for USPS delivery areas. They match for almost every home. For a mailing address, the USPS ZIP Code lookup has the final word.

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Updated 2026-11-10 · Where the data comes from