| ZIP Codes: | 9 ZIP Codes (9 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 701 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:44 PM |
| Population: | 1,119 [See All] |
| FIPS: | 38077 |
| CBSA: | Wahpeton, ND-MN |
| Land Area: | 1,166 sq mi |
| Water Area: | 4 sq mi |
| Coordinates: | 45.7833, -96.7423 |
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9,833 residents live across 9 ZIPs covering 1,166 sq mi, served by 9 distinct USPS-recognized cities.
Population moved from 10,233 to 9,833 from 2014 to 2024 — a -3.9% change. 3 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 57227 (Corona, $96,500 median) and poorest ZIP 57262 (Sisseton, $51,889) are 27.2 miles apart — a 1.9× income gap across local geography.
Median home values vary 3.0× across this county — from $75,000 in 57224 (Claire City) to $225,000 in 57256 (Ortley).
Density varies 4× across the county — from 4 people/sq mi in 57224 (Claire City) to 14 in 57262 (Sisseton).
Educational attainment ranges from 6.9% bachelor's+ in 57227 (Corona) to 39.1% in 57224 (Claire City) — the breadth of educational profiles across the area.
Within South Dakota, this is the #73 most populous of 82 counties and ranks #20 for median household income .
Weighted by population, the typical household earns about $62,315 across the county — reflecting what a typical resident sees, not a simple ZIP average.
18.6% of adults age 25+ hold a bachelor's degree or higher (1,152 of 6,179 reporting).
9 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
Roberts County lost 8.3% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 57262 | Sisseton | Standard | 5,100 | $51,889 | 364.4 | -6.5% |
| 57260 | Rosholt | Standard | 1,119 | $82,656 | 177.8 | -8.3% |
| 57279 | Wilmot | Standard | 899 | $71,324 | 152.0 | -11.6% |
| 57257 | Peever | Standard | 637 | $55,625 | 105.5 | -27.9% |
| 57266 | Summit | Standard | 626 | $72,500 | 126.8 | -1.1% |
| 57227 | Corona | Standard | 562 | $96,500 | 45.0 | 52.7% |
| 57255 | New Effington | Standard | 488 | $63,393 | 101.7 | 31.5% |
| 57256 | Ortley | Standard | 238 | $66,500 | 46.5 | 221.6% |
| 57224 | Claire City | Standard | 164 | $59,063 | 46.3 | -23.4% |