Frankfort, SD ZIP code
The ZIP code for Frankfort, South Dakota is 57440. It is in Spink County.
- Population in these ZIPs
- 466
- Avg. median income
- $54,600population-weighted
- Typical home value
- $190,000population-weighted
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Frankfort, SD ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 57440 | 466 | $54,625 | $190,000 |
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 Frankfort
Frequently asked questions
What is the ZIP code for Frankfort, SD?
The ZIP code for Frankfort, SD is 57440.
What county is Frankfort, South Dakota in?
Frankfort ZIP codes are in Spink County.