Postal entity record
US 51101 Postal Code Data Source-backed
51101 postal code facts for Sioux City, US: region, coordinates, source, and nearby postal codes.
CountryUS
PlaceSioux City
RegionIA
Nearby rows12
Key metadata
| Place | Sioux City |
|---|---|
| Admin area | Iowa / IA |
| Local area | Woodbury |
| Coordinates | 42.4972, -96.4029 |
| 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 51101 to Sioux City, 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 | Sioux City |
| postal_code | admin_area | Iowa |
| postal_code | centroid | 42.4972, -96.4029 |
Nearby postal codes
| Code | Place | Region | Distance |
|---|---|---|---|
| 51105 | Sioux City | Iowa | 1.1 mi |
| 51103 | Sioux City | Iowa | 1.5 mi |
| 51104 | Sioux City | Iowa | 2 mi |
| 68776 | South Sioux City | Nebraska | 2.3 mi |
| 51106 | Sioux City | Iowa | 3.3 mi |
| 51108 | Sioux City | Iowa | 4 mi |
| 51109 | Sioux City | Iowa | 4.2 mi |
| 57049 | North Sioux City | South Dakota | 5.7 mi |
| 51111 | Sioux City | Iowa | 6.3 mi |
| 51054 | Sergeant Bluff | Iowa | 7.1 mi |
| 68731 | Dakota City | Nebraska | 8.5 mi |
| 51024 | Hinton | Iowa | 8.9 mi |