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County ZIP codes · South Dakota · FIPS 46053

Gregory County, SD ZIP Codes

Gregory County, South Dakota has 8 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 6 of the residential ones lie mainly in Gregory County and 2 mainly in a neighboring county; 3 cross the county line.

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Gregory County?

57317 · Bonesteel: $51k57335 · Fairfax: $93k57523 · Burke: $69k57529 · Dallas: $75k57533 · Gregory: $59k57538 · Herrick: $47k57571 · Saint Charles: –68719 · Bristow: –5753357523575295731757538573356871957317 · Bonesteel: $51k57335 · Fairfax: $93k57523 · Burke: $69k57529 · Dallas: $75k57533 · Gregory: $59k57538 · Herrick: $47k57571 · Saint Charles: –68719 · Bristow: –5753357523575295731757538573356871957317 · Bonesteel: $51k57335 · Fairfax: $93k57523 · Burke: $69k57529 · Dallas: $75k57533 · Gregory: $59k57538 · Herrick: $47k57571 · Saint Charles: –68719 · Bristow: –575335752357529573175753857335
The residential ZIP codes of Gregory 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).

All 8 residential ZIP codes in Gregory County

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

Residential ZIP codes mainly in Gregory County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
57533 Gregory 1,674 4 $59k $122k 72%
57523 Burke 1,041 4 $69k $214k 100%
57317 Bonesteel 573 4 $51k $95k 100%
57335 Fairfax 303 3 $93k $126k 100%
57538 Herrick 236 2 $47k $61k 100%
57571 Saint Charles 22 2 – – 100%

Partly in Gregory County

Residential ZIP codes mainly in another county that reach at least 1% into Gregory County, by their share here
In this county
68719 Bristow 154 3 – $178k 39%
57529 Dallas 245 1 $75k $266k 30%

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?

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

Share of each ZIP code's land in Gregory County and in the neighboring counties
ZIPIn GregoryElsewhere
5753372%Lyman County 27%; Tripp County 1%
5752930%Tripp County 70%
6871939%Boyd County 61%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Gregory County's ZIP codes use 3 prefixes: 573, 575 and 687.

Three-digit prefixes of Gregory 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 Gregory County's
PrefixSectional centerHereAll codes
573 Dakota Central, SD (SCF 572) 2 62
575 Dakota Central, SD (SCF 572) 5 43
687 Omaha, NE (SCF 680) 1 75

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