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County ZIP codes · South Dakota · FIPS 46047

Fall River County, SD ZIP Codes

Fall River County, South Dakota has 7 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 5 of the residential ones lie mainly in Fall River County and 2 mainly in a neighboring county; 4 cross the county line. Median household income ranges from $54,306 in 69337 (Chadron) to $71,576 in 57735 (Edgemont) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Fall River County?

57722 · Buffalo Gap: $59k57735 · Edgemont: $72k57747 · Hot Springs: $68k57763 · Oelrichs: $74k57766 · Oral: $96k57782 · Smithwick: $66k69337 · Chadron: $54k6933757735577225774757763577665778257722 · Buffalo Gap: $59k57735 · Edgemont: $72k57747 · Hot Springs: $68k57763 · Oelrichs: $74k57766 · Oral: $96k57782 · Smithwick: $66k69337 · Chadron: $54k6933757735577225774757763577665778257722 · Buffalo Gap: $59k57735 · Edgemont: $72k57747 · Hot Springs: $68k57763 · Oelrichs: $74k57766 · Oral: $96k57782 · Smithwick: $66k69337 · Chadron: $54k693375773557722577475776357766
The residential ZIP codes of Fall River 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 7 postal town names: Chadron, Hot Springs, Edgemont, Oelrichs, Buffalo Gap, Oral, Smithwick.

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

All 7 residential ZIP codes in Fall River County

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

Residential ZIP codes mainly in Fall River County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
57747 Hot Springs 5,839 11 $68k $221k 73%
57735 Edgemont 1,727 2 $72k $166k 77%
57763 Oelrichs 356 1 $74k $123k 100%
57766 Oral 176 1 $96k – 100%
57782 Smithwick 58 1 $66k $271k 100%

Partly in Fall River County

Residential ZIP codes mainly in another county that reach at least 1% into Fall River County, by their share here
In this county
57722 Buffalo Gap 177 0 $59k $69k 14%
69337 Chadron 6,466 8 $54k $164k 3%

Download the 7 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?

4 ZIP codes of Fall River County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Fall River County and in the neighboring counties
ZIPIn Fall RiverElsewhere
693373%Dawes County79%; Oglala Lakota County11%; Sheridan County7%
5774773%Custer County27%
5773577%Custer County21%; Sioux County2%
5772214%Oglala Lakota County55%; Custer County31%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Fall River County's ZIP codes use 2 prefixes: 577 and 693.

Three-digit prefixes of Fall River 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 Fall River County's
PrefixSectional centerHereAll codes
577Rapid City, SD (SCF 577)658
693North Platte, NE (SCF 691)130

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