In which county is ZIP code 57646 located?

ZIP 57646 is listed under Campbell, SD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 57646: Mound City, SD

ZIP: 57646

County: Campbell

Coordinates: 45.67860, -100.04790

ZIP Type: Standard

Time Zone: Mountain Time (MT)

Explore detailed information for ZIP code 57646 in Mound City, SD. We include verified county details for Campbell plus key geographic references used for mapping and logistics.

Primary City	Mound City
ZIP Code	57646
County	Campbell
State	SD
Latitude / Longitude	45.67860, -100.04790
ZIP Type	Standard
Time Zone	Mountain Time (MT)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 57646 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 57646 is approximately 45.67860 (latitude) and -100.04790 (longitude). This location sits within Campbell, contributing to regional planning across SD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 57646 for mail delivery and general location reference in Campbell, SD.

Some addresses near Mound City may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near Mound City within SD.

Frequently Asked Questions

What is the primary city for ZIP code 57646?

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

In which county is 57646 located?

ZIP code 57646 is situated within Campbell, SD.

What are the coordinates for 57646?

The approximate center point is 45.67860 (Latitude) and -100.04790 (Longitude).

Is ZIP code 57646 active?

This page lists ZIP 57646 as Listed based on the latest refresh date shown above.

Does ZIP 57646 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