South Dakota ZIP Codes

ZIP codes: 385
Cities & towns: 363
Counties: 66
Area codes: 1

How South Dakota ZIP codes are numbered

570xx–577xx

The first three digits identify the sectional center facility that processes mail for a region, so a South Dakota ZIP code can be placed geographically from its prefix alone. Each row names the city holding the most codes in that prefix.

South Dakota three-digit ZIP prefixes, the codes in each, and the city that holds the most of them.
Prefix	ZIP codes	Main area
570xx	69	Brookings
571xx	15	Sioux Falls
572xx	56	Arlington
573xx	62	Chamberlain
574xx	50	Aberdeen
575xx	43	Agar
576xx	32	Bison
577xx	58	Rapid City

Where South Dakota's communities sit

Each point is a South Dakota community with a published ZIP code list, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

South Dakota cities by ZIP code count

largest 25

Area codes serving South Dakota

605 Sioux Falls

Scope every ZIP code recorded in South Dakota. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. The map outline is a convex envelope of published places, not a state boundary.