Zip Code 57656 — Timber Lake, SD
57656 is a ZIP Code associated with Timber Lake, SD, located within Dewey. 57656 ranks #3 out of 7 ZIP codes in Dewey County by population (and #140 out of 375 in SD). The area supports an estimated population of 1,000 residents across Data Pending housing units, with a population density of 1.0 people per square mile.
WorldPlaceData database updated: October 2026
📍 View location on OpenStreetMap (45.423870, -101.106960)
| Data Metric | Local Statistic |
|---|
| Postal / Zip Code | 57656 |
| Primary City | Timber Lake |
| State / Province | SD |
| County | Dewey |
| Total Population | 1,000 |
| Median Household Income | Data Pending |
| Total Housing Units | Data Pending |
| Population Density | 1.0 people/sq mi |
| Timezone | America/Denver |
How 57656 Compares
| Metric | ZIP 57656 | Dewey County | SD State Average |
|---|
| Population | 1,000 | 8,754 (Total) | 906,188 (Total) |
| Average ZIP Income | Data Pending | N/A | N/A |
| Population Density | 1.0 /sq mi | -- | -- |
| County Pop Rank | #3 of 7 | -- | -- |
Nearby ZIP Codes
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →