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County ZIP codes · South Dakota · FIPS 46017

Buffalo County, SD ZIP Codes

Buffalo County, South Dakota has 6 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 2 of the residential ones lie mainly in Buffalo County and 4 mainly in a neighboring county; 5 cross the county line. Median household income ranges from $46,136 in 57339 (Fort Thompson) to $80,139 in 57325 (Chamberlain) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Buffalo County?

57325 · Chamberlain: $80k57339 · Fort Thompson: $46k57341 · Gann Valley: –57355 · Kimball: $63k57362 · Miller: $67k57370 · Pukwana: $59k57362573255735557341573705733957325 · Chamberlain: $80k57339 · Fort Thompson: $46k57341 · Gann Valley: –57355 · Kimball: $63k57362 · Miller: $67k57370 · Pukwana: $59k57362573255735557341573705733957325 · Chamberlain: $80k57339 · Fort Thompson: $46k57341 · Gann Valley: –57355 · Kimball: $63k57362 · Miller: $67k57370 · Pukwana: $59k5736257325573555734157339
The residential ZIP codes of Buffalo 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 6 postal town names: Chamberlain, Miller, Fort Thompson, Kimball, Pukwana, Gann Valley.

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

All 6 residential ZIP codes in Buffalo County

2 ZIP codes lie mainly in Buffalo County; 4 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Buffalo County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
57339 Fort Thompson 1,390 26 $46k $122k 100%
57341 Gann Valley 79 0 – – 96%

Partly in Buffalo County

Residential ZIP codes mainly in another county that reach at least 1% into Buffalo County, by their share here
In this county
57325 Chamberlain 3,335 12 $80k $230k 36%
57370 Pukwana 894 4 $59k $180k 22%
57355 Kimball 1,120 3 $63k $144k 4%
57362 Miller 1,967 4 $67k $159k 3%

Download the 6 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?

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

Share of each ZIP code's land in Buffalo County and in the neighboring counties
ZIPIn BuffaloElsewhere
5732536%Brule County 64%
573623%Hand County 97%
573554%Brule County 89%; Jerauld County 7%
5737022%Brule County 78%
5734196%Brule County 4%

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

Which first three digits do Buffalo 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 Buffalo County starts with 573.

Three-digit prefixes of Buffalo 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 Buffalo County's
PrefixSectional centerHereAll codes
573 Dakota Central, SD (SCF 572) 6 62

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