Postal entity record
US 51040 Postal Code Data Source-backed
51040 postal code facts for Onawa, US: region, coordinates, source, and nearby postal codes.
CountryUS
PlaceOnawa
RegionIA
Nearby rows12
Key metadata
| Place | Onawa |
|---|---|
| Admin area | Iowa / IA |
| Local area | Monona |
| Coordinates | 42.037, -96.1072 |
| 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 51040 to Onawa, 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 | Onawa |
| postal_code | admin_area | Iowa |
| postal_code | centroid | 42.037, -96.1072 |
Nearby postal codes
| Code | Place | Region | Distance |
|---|---|---|---|
| 51523 | Blencoe | Iowa | 7.9 mi |
| 68020 | Decatur | Nebraska | 8.3 mi |
| 51063 | Whiting | Iowa | 8.8 mi |
| 51010 | Castana | Iowa | 10.5 mi |
| 51051 | Rodney | Iowa | 13 mi |
| 68039 | Macy | Nebraska | 14.1 mi |
| 51055 | Sloan | Iowa | 15.6 mi |
| 51056 | Smithland | Iowa | 16.3 mi |
| 51545 | Little Sioux | Iowa | 16.3 mi |
| 51558 | Moorhead | Iowa | 16.5 mi |
| 51572 | Soldier | Iowa | 16.9 mi |
| 51026 | Hornick | Iowa | 17.5 mi |