Castlewood, SD ZIP code
The ZIP code for Castlewood, South Dakota is 57223. It is in Hamlin County.
- Population in these ZIPs
- 1,429
- Avg. median income
- $92,400population-weighted
- Typical home value
- $339,800population-weighted
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Castlewood, SD ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 57223 | 1,429 | $92,424 | $339,800 |
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 near Castlewood
Frequently asked questions
What is the ZIP code for Castlewood, SD?
The ZIP code for Castlewood, SD is 57223.
What county is Castlewood, South Dakota in?
Castlewood ZIP codes are in Hamlin County.