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County ZIP codes · South Dakota · FIPS 46043

Douglas County, SD ZIP Codes

Douglas County, South Dakota has 8 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 5 of the residential ones lie mainly in Douglas County and 3 mainly in a neighboring county; 6 cross the county line. Median household income ranges from $78,100 in 57369 (Platte) to $86,985 in 57328 (Corsica) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Douglas County?

57313 · Armour: $89k57328 · Corsica: $87k57330 · Delmont: $72k57331 · Dimock: $101k57344 · Harrison: –57364 · New Holland: –57366 · Parkston: $78k57369 · Platte: $78k5736957366573135732857330573315734457313 · Armour: $89k57328 · Corsica: $87k57330 · Delmont: $72k57331 · Dimock: $101k57344 · Harrison: –57364 · New Holland: –57366 · Parkston: $78k57369 · Platte: $78k5736957366573135732857330573315734457313 · Armour: $89k57328 · Corsica: $87k57330 · Delmont: $72k57331 · Dimock: $101k57344 · Harrison: –57364 · New Holland: –57366 · Parkston: $78k57369 · Platte: $78k5736957366573135732857331
The residential ZIP codes of Douglas County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

They carry 8 postal town names: Platte, Parkston, Corsica, Armour, Delmont, Dimock, Harrison, New Holland.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 8 residential ZIP codes in Douglas County

5 ZIP codes lie mainly in Douglas County; 3 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Douglas County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
57328 Corsica 1,290 8 $87k $211k 98%
57313 Armour 1,220 7 $89k $117k 66%
57330 Delmont 594 5 $72k $144k 61%
57344 Harrison 39 1 – $275k 100%
57364 New Holland 4 4 – – 100%

Partly in Douglas County

Residential ZIP codes mainly in another county that reach at least 1% into Douglas County, by their share here
In this county
57331 Dimock 231 3 $101k $293k 23%
57366 Parkston 2,598 12 $78k $185k 11%
57369 Platte 2,630 6 $78k $237k 2%

Download the 8 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

6 ZIP codes of Douglas County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Douglas County and in the neighboring counties
ZIPIn DouglasElsewhere
573692%Charles Mix County 74%; Brule County 23%
5736611%Hutchinson County 89%
5732898%Aurora County 2%
5731366%Charles Mix County 34%
5733061%Charles Mix County 26%; Hutchinson County 13%
5733123%Hutchinson County 66%; Davison County 11%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Douglas County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Douglas County starts with 573.

Three-digit prefixes of Douglas County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Douglas County's
PrefixSectional centerHereAll codes
573 Dakota Central, SD (SCF 572) 8 62

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.