Sully County, South Dakota ZIP codes
2 ZIP codes are in Sully County, plus 4 that cross in from neighboring counties.
- ZIP codes
- 2
- Population in these ZIPs
- 1,080
- Avg. median income
- $71,700population-weighted
- Cities & towns
- 2
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ZIP codes in Sully County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 57520 | Agar | 118 | $50,417 | $118,800 |
| 57564 | Onida | 962 | $74,297 | $240,900 |
ZIP codes partly in Sully County
These ZIP codes are mostly in a neighboring county but cover part of Sully County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 57442 | Gettysburg | Potter County | 1,772 | $65,625 | $170,300 |
| 57501 | Pierre | Hughes County | 17,326 | $81,791 | $298,600 |
| 57522 | Blunt | Hughes County | 521 | $72,188 | $166,200 |
| 57536 | Harrold | Hughes County | 277 | $53,125 | $353,100 |
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 Sully County
Nearby counties
Frequently asked questions
How many ZIP codes are in Sully County, South Dakota?
2 ZIP codes are mainly in Sully County, and 4 more ZIP codes from neighboring areas reach partly into it.
What cities are in Sully County?
ZIP codes in Sully County use the city names Agar and Onida.