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zipcodes.pro — STATE/SD/COUNTY/CUSTER

Custer County, SD ZIP codes

Custer County, SD has 4 ZIP codes, in 4 towns: 57730, 57744, 57738 and 57773. 4 more cross into it from neighbouring counties.

The county seat is Custer.

ZIP codes
4
Partly in it
4 more
Towns
4
County seat
Custer
County FIPS
46033
Population
8,892
Median household income
$84,112
Land area
1,557 sq mi
Metro area
Rapid City

Custer County ZIP codes by town

Custer (county seat)
57730

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

ZIP codes partly in Custer County

These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of Custer County.

Map of Custer County ZIP codes

57730577385774457773

The ZIP codes of Custer County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Custer County in numbers

About 8,892 people live in Custer County, in 4,451 households, the 21st most populous of South Dakota's 66 counties. The median household income is $84,112 a year, 12% above the South Dakota median of $75,081 (US: $80,734). The median owner-occupied home is valued at $372,100 (45% above the South Dakota median), and median gross rent is $1,112 a month. The median age is 57.6; 31.6% of adults 25 and over hold a bachelor's degree or higher (31.9% across South Dakota); the average commute takes 30 minutes.

Population8,892Custer8,892
Households4,451Custer4,451
Median age57.6Custer57.6South Dakota38.0US 38.9
Median household income$84,112Custer$84,112South Dakota$75,081US $80,734
Median home value$372,100Custer$372,100South Dakota$257,400US $332,700
Median gross rent$1,112Custer$1,112South Dakota$946US $1,413
Bachelor's degree or higher31.6%Custer31.6%South Dakota31.9%US 35.7%
Mean commute29.5 minCuster29.5 minSouth Dakota17.8 minUS 26.4 min
Population density6 / sq miCuster6 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Custer County

Largest towns in Custer County
TownZIP codesPopulation
Custer 1 2,341
Hermosa 1 353
Pringle 1 206
Fairburn 1 61

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Custer County.

Not sure you are in Custer County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Custer County, with figures

ZIP codes in Custer County
ZIP City Type Population Median income Median home
57730 Custer , SD Standard 5,596 $83,469 $378,800
57738 Fairburn , SD Standard 356 $52,308 —
57744 Hermosa , SD Standard 2,421 $106,250 $386,800
57773 Pringle , SD Standard 206 — —

Cite this page

zipcodes.pro. “Custer County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/sd/county/custer

Underlying data is public domain or openly licensed — sources, vintages and licences.