In which county is ZIP code 57439 located?

ZIP 57439 is listed under Brown, SD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 57439: Ferney, SD

ZIP: 57439

County: Brown

Coordinates: 45.32900, -98.08370

ZIP Type: Standard

Time Zone: Central Time (CT)

Explore detailed information for ZIP code 57439 in Ferney, SD. We include verified county details for Brown plus key geographic references used for mapping and logistics.

Primary City	Ferney
ZIP Code	57439
County	Brown
State	SD
Latitude / Longitude	45.32900, -98.08370
ZIP Type	Standard
Time Zone	Central Time (CT)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 57439 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 57439 are listed as 45.32900 / -98.08370, useful for GPS and service checks in and around Ferney, SD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 57439 for mail delivery and general location reference in Brown, SD.

Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Ferney.

Related ZIP Codes (Nearby)

Explore other postal codes near Ferney within SD.

Frequently Asked Questions

What is the primary city for ZIP code 57439?

The primary city for this ZIP code is Ferney, located in SD.

In which county is 57439 located?

ZIP code 57439 is situated within Brown, SD.

What are the coordinates for 57439?

The approximate center point is 45.32900 (Latitude) and -98.08370 (Longitude).

Is ZIP code 57439 active?

This page lists ZIP 57439 as Listed based on the latest refresh date shown above.

Does ZIP 57439 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08