Brown County, SD ZIP codes
There are 15 ZIP codes in Brown County, SD, in 14 towns, from 57401 to 57481. The largest are 57401 (Aberdeen), 57445 (Groton) and 57427 (Bath).
The county seat is Aberdeen.
- ZIP codes
- 15
- Towns
- 14
- County seat
- Aberdeen
- County FIPS
46013- State
- South Dakota
- Population
- 37,877
- Median household income
- $70,898
- Land area
- 1,713 sq mi
- Area code
- 605
- Metro area
- Aberdeen
Brown County ZIP codes by town
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.
Map of Brown County ZIP codes
The ZIP codes of Brown 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.
Brown County in numbers
About 37,877 people live in Brown County, in 16,285 households, the 4th most populous of South Dakota's 66 counties. The median household income is $70,898 a year, 6% below the South Dakota median of $75,081 (US: $80,734). The median owner-occupied home is valued at $221,100 (14% below the South Dakota median), and median gross rent is $777 a month. The median age is 37.8; 33.8% of adults 25 and over hold a bachelor's degree or higher (31.9% across South Dakota); the average commute takes 14 minutes.
| Population | 37,877 |
|---|---|
| Households | 16,285 |
| Median age | 37.8 |
| Median household income | $70,898 |
| Median home value | $221,100 |
| Median gross rent | $777 |
| Bachelor's degree or higher | 33.8% |
| Mean commute | 13.9 min |
| Population density | 22 / 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 Brown County
| Town | ZIP codes | Population |
|---|---|---|
| Aberdeen | 2 | 28,189 |
| Groton | 1 | 1,691 |
| Warner | 1 | 512 |
| Houghton | 1 | 357 |
| Hecla | 1 | 182 |
| Columbia | 1 | 161 |
| Frederick | 1 | 160 |
| Claremont | 1 | 106 |
| Westport | 1 | 93 |
| Bath | 1 | 91 |
| Stratford | 1 | 62 |
| Barnard | 1 | 42 |
| Mansfield | 1 | 12 |
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 Brown County.
- Spink County (10)
- Day County (7)
- Dickey County, ND (5)
- Marshall County (6)
- Edmunds County (3)
- Clark County (6)
- McPherson County (4)
- Faulk County (4)
Not sure you are in Brown County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Brown County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
57401 | Aberdeen , SD | Standard | 31,939 | $68,835 | $226,200 |
57402 | Aberdeen , SD | No street area | — | — | — |
57426 | Barnard , SD | Standard | 42 | $78,875 | — |
57427 | Bath , SD | Standard | 384 | $83,977 | $363,700 |
57432 | Claremont , SD | Standard | 507 | $112,765 | $77,600 |
57433 | Columbia , SD | Standard | 318 | $50,417 | — |
57439 | Ferney , SD | Standard | 0 | — | — |
57441 | Frederick , SD | Standard | 670 | $108,009 | $152,100 |
57445 | Groton , SD | Standard | 2,072 | $84,948 | $193,800 |
57446 | Hecla , SD | Standard | 223 | $44,375 | $50,400 |
57449 | Houghton , SD | Standard | 357 | $150,000 | — |
57460 | Mansfield , SD | Standard | 257 | $139,500 | $233,900 |
57474 | Stratford , SD | Standard | 237 | $100,833 | $204,700 |
57479 | Warner , SD | Standard | 625 | $102,222 | $256,300 |
57481 | Westport , SD | Standard | 271 | $68,125 | $215,600 |
Cite this page
zipcodes.pro. “Brown County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/sd/county/brown
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