Postal entity record
US 57278 Postal Code Data Source-backed
57278 postal code facts for Willow Lake, US: region, coordinates, source, and nearby postal codes.
CountryUS
PlaceWillow Lake
RegionSD
Nearby rows12
Key metadata
| Place | Willow Lake |
|---|---|
| Admin area | South Dakota / SD |
| Local area | Clark |
| Coordinates | 44.6272, -97.6747 |
| GeoNames accuracy | 4 |
| Source | GeoNames postal code data |
| License | GeoNames postal data; provided as-is with attribution required. |
| Snapshot date | 2026-06-02 |
What this record means
This row links US 57278 to Willow Lake, the available admin area, centroid coordinates, source accuracy, and source snapshot metadata.
Use it as a reference-data join for cleaning CRM rows, grouping operational reports, preparing territory QA, or checking whether an imported postal value has a source-backed match.
What the centroid can support
The latitude and longitude represent a postal centroid from the source snapshot. They are useful for approximate map previews, nearby-record review, deduplication checks, and distance-based QA.
They should not be treated as an official delivery boundary, address-level geocode, tax boundary, or service-area guarantee.
Sample CSV enrichment output
| Input field | Added output | Example value |
|---|---|---|
| postal_code | matched_place | Willow Lake |
| postal_code | admin_area | South Dakota |
| postal_code | centroid | 44.6272, -97.6747 |
Nearby postal codes
| Code | Place | Region | Distance |
|---|---|---|---|
| 57271 | Vienna | South Dakota | 10.3 mi |
| 57221 | Bryant | South Dakota | 11 mi |
| 57322 | Carpenter | South Dakota | 12.2 mi |
| 57233 | Erwin | South Dakota | 16 mi |
| 57225 | Clark | South Dakota | 17.5 mi |
| 57231 | De Smet | South Dakota | 17.6 mi |
| 57386 | Yale | South Dakota | 19.4 mi |
| 57242 | Hazel | South Dakota | 20.1 mi |
| 57258 | Raymond | South Dakota | 20.2 mi |
| 57243 | Henry | South Dakota | 21.1 mi |
| 57353 | Iroquois | South Dakota | 21.4 mi |
| 57241 | Hayti | South Dakota | 22 mi |