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County ZIP codes · South Dakota · FIPS 46103

Pennington County, SD ZIP Codes

Pennington County, South Dakota has 21 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 20 residential and 1 for PO boxes or a single organization. 9 of the residential ones lie mainly in Pennington County and 11 mainly in a neighboring county; 17 cross the county line. Median household income ranges from $56,461 in 57701 (Rapid City) to $97,734 in 57761 (New Underwood) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Pennington County?

57701 · Rapid City: $57k57702 · Rapid City: $92k57703 · Rapid City: $84k57706 · Ellsworth Afb: $57k57718 · Black Hawk: $84k57719 · Box Elder: $75k57725 · Caputa: $48k57730 · Custer: $84k57732 · Deadwood: $44k57744 · Hermosa: $106k57745 · Hill City: $88k57750 · Interior: –57751 · Keystone: $98k57761 · New Underwood: $98k57767 · Owanka: $250k+57775 · Quinn: $78k57780 · Scenic: $40k57790 · Wall: $75k57791 · Wasta: $42k82701 · Newcastle: $91k8270157790577445773057791577805776157745577505770257775577325771957725577035776757701577515771857701 · Rapid City: $57k57702 · Rapid City: $92k57703 · Rapid City: $84k57706 · Ellsworth Afb: $57k57718 · Black Hawk: $84k57719 · Box Elder: $75k57725 · Caputa: $48k57730 · Custer: $84k57732 · Deadwood: $44k57744 · Hermosa: $106k57745 · Hill City: $88k57750 · Interior: –57751 · Keystone: $98k57761 · New Underwood: $98k57767 · Owanka: $250k+57775 · Quinn: $78k57780 · Scenic: $40k57790 · Wall: $75k57791 · Wasta: $42k82701 · Newcastle: $91k8270157790577445773057791577805774557750577025773257719577255775157701 · Rapid City: $57k57702 · Rapid City: $92k57703 · Rapid City: $84k57706 · Ellsworth Afb: $57k57718 · Black Hawk: $84k57719 · Box Elder: $75k57725 · Caputa: $48k57730 · Custer: $84k57732 · Deadwood: $44k57744 · Hermosa: $106k57745 · Hill City: $88k57750 · Interior: –57751 · Keystone: $98k57761 · New Underwood: $98k57767 · Owanka: $250k+57775 · Quinn: $78k57780 · Scenic: $40k57790 · Wall: $75k57791 · Wasta: $42k82701 · Newcastle: $91k827015779057744577305778057745
The residential ZIP codes of Pennington 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?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $83,469 and $90,922.

They carry 18 postal town names.

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

All 20 residential ZIP codes in Pennington County

9 ZIP codes lie mainly in Pennington County; 11 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Pennington County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
57701 Rapid City 45,795 877 $57k $251k 64%
57702 Rapid City 35,595 125 $92k $390k 94%
57703 Rapid City 18,013 139 $84k $277k 100%
57745 Hill City 1,894 5 $88k $344k 100%
57790 Wall 1,147 2 $75k $188k 98%
57751 Keystone 893 20 $98k $474k 67%
57775 Quinn 191 1 $78k $88k 46%
57725 Caputa 130 1 $48k $283k 100%
57780 Scenic 70 0 $40k – 91%

Partly in Pennington County

Residential ZIP codes mainly in another county that reach at least 1% into Pennington County, by their share here
In this county
57767 Owanka 234 2 $250k+ – 49%
57761 New Underwood 1,180 3 $98k $253k 33%
57791 Wasta 97 0 $42k $113k 29%
57719 Box Elder 12,221 73 $75k $317k 23%
57744 Hermosa 2,421 5 $106k $387k 22%
57732 Deadwood 1,714 14 $44k $232k 10%
57730 Custer 5,596 11 $84k $379k 8%
57706 Ellsworth Afb 2,787 454 $57k – 7%
82701 Newcastle 5,459 3 $91k $231k 3%
57750 Interior 365 1 – $175k 2%
57718 Black Hawk 7,937 299 $84k $300k 1%

Download the 21 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?

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

Share of each ZIP code's land in Pennington County and in the neighboring counties
ZIPIn PenningtonElsewhere
5770164%Meade County 36%
5770294%Meade County 6%
5771923%Meade County 77%
577181%Meade County 99%
577308%Custer County 92%
827013%Weston County 77%; Niobrara County 9%; Campbell County 6%; Custer County 4%
577067%Meade County 93%
5774422%Custer County 64%; Oglala Lakota County 15%
5773210%Lawrence County 90%
5776133%Meade County 67%
5779098%Jackson County 2%
5775167%Custer County 33%
577502%Jackson County 98%
5776749%Meade County 51%
5777546%Haakon County 40%; Jackson County 14%
5779129%Meade County 71%
5778091%Oglala Lakota County 9%

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

PO Box and single-organization ZIP codes

ZIP codes in Pennington County without a residential area (GeoNames postal codes)
ZIPPostal name
57709Rapid City

Source: GeoNames postal codes (CC BY 4.0).

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Pennington County's ZIP codes use 2 prefixes: 577 and 827.

Three-digit prefixes of Pennington 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 Pennington County's
PrefixSectional centerHereAll codes
577 Rapid City, SD (SCF 577) 20 58
827 Casper, WY (SCF 826) 1 18

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