In which county is ZIP code 57278 located?

ZIP 57278 is listed under Clark, SD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 57278: Willow Lake, SD

ZIP: 57278

County: Clark

Coordinates: 44.62720, -97.67470

ZIP Type: Standard

Time Zone: Central Time (CT)

Get a reliable snapshot of the Willow Lake, SD postal area 57278. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Willow Lake
ZIP Code	57278
County	Clark
State	SD
Latitude / Longitude	44.62720, -97.67470
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 57278 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 57278 are listed as 44.62720 / -97.67470, useful for GPS and service checks in and around Willow Lake, SD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 57278 for mail delivery and general location reference in Clark, SD.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Willow Lake within SD.

Frequently Asked Questions

What is the primary city for ZIP code 57278?

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

In which county is 57278 located?

ZIP code 57278 is situated within Clark, SD.

What are the coordinates for 57278?

The approximate center point is 44.62720 (Latitude) and -97.67470 (Longitude).

Is ZIP code 57278 active?

This page lists ZIP 57278 as Listed based on the latest refresh date shown above.

Does ZIP 57278 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