Hamlin County, South Dakota ZIP codes
5 ZIP codes are in Hamlin County, plus 7 that cross in from neighboring counties.
- ZIP codes
- 5
- Population in these ZIPs
- 5,138
- Avg. median income
- $89,400population-weighted
- Cities & towns
- 5
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ZIP codes in Hamlin County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 57221 | Bryant | 1,158 | $73,988 | $290,300 |
| 57223 | Castlewood | 1,429 | $92,424 | $339,800 |
| 57241 | Hayti | 936 | $85,833 | $313,600 |
| 57242 | Hazel | 320 | $113,958 | $517,700 |
| 57248 | Lake Norden | 1,295 | $96,364 | $382,100 |
ZIP codes partly in Hamlin County
These ZIP codes are mostly in a neighboring county but cover part of Hamlin County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 57201 | Watertown | Codington County | 26,781 | $72,878 | $321,500 |
| 57212 | Arlington | Kingsbury County | 1,819 | $93,750 | $315,700 |
| 57226 | Clear Lake | Deuel County | 1,953 | $83,125 | $254,500 |
| 57234 | Estelline | Deuel County | 1,339 | $82,358 | $287,700 |
| 57238 | Goodwin | Deuel County | 315 | $66,250 | $225,700 |
| 57243 | Henry | Codington County | 549 | $48,542 | $489,400 |
| 57271 | Vienna | Clark County | 246 | $85,524 | $307,800 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Hamlin County
Nearby counties
Frequently asked questions
How many ZIP codes are in Hamlin County, South Dakota?
5 ZIP codes are mainly in Hamlin County, and 7 more ZIP codes from neighboring areas reach partly into it.
What cities are in Hamlin County?
ZIP codes in Hamlin County use the city names Bryant, Castlewood, Hayti, Hazel and Lake Norden.