Postal entity record
US 57042 Postal Code Data Source-backed
57042 postal code facts for Madison, US: region, coordinates, source, and nearby postal codes.
CountryUS
PlaceMadison
RegionSD
Nearby rows12
Key metadata
| Place | Madison |
|---|---|
| Admin area | South Dakota / SD |
| Local area | Lake |
| Coordinates | 44.0054, -97.1149 |
| 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 57042 to Madison, 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 | Madison |
| postal_code | admin_area | South Dakota |
| postal_code | centroid | 44.0054, -97.1149 |
Nearby postal codes
| Code | Place | Region | Distance |
|---|---|---|---|
| 57075 | Wentworth | South Dakota | 7.8 mi |
| 57057 | Rutland | South Dakota | 9.2 mi |
| 57016 | Chester | South Dakota | 10.1 mi |
| 57054 | Ramona | South Dakota | 10.1 mi |
| 57050 | Nunda | South Dakota | 11.8 mi |
| 57076 | Winfred | South Dakota | 12.3 mi |
| 57017 | Colman | South Dakota | 15.1 mi |
| 57018 | Colton | South Dakota | 16.5 mi |
| 57061 | Sinai | South Dakota | 16.9 mi |
| 57051 | Oldham | South Dakota | 18.3 mi |
| 57048 | Montrose | South Dakota | 21 mi |
| 57349 | Howard | South Dakota | 22.2 mi |