In which county is ZIP code 57420 located?

ZIP 57420 is listed under Walworth, SD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 57420: Akaska, SD

ZIP: 57420

County: Walworth

Coordinates: 45.33240, -100.11860

ZIP Type: Standard

Time Zone: Mountain Time (MT)

Get a reliable snapshot of the Akaska, SD postal area 57420. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Akaska
ZIP Code	57420
County	Walworth
State	SD
Latitude / Longitude	45.33240, -100.11860
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 57420 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 57420 is approximately 45.33240 (latitude) and -100.11860 (longitude). This location sits within Walworth, contributing to regional planning across SD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 57420 for mail delivery and general location reference in Walworth, SD.

This ZIP may extend beyond the city core into nearby communities within Walworth.

Related ZIP Codes (Nearby)

Explore other postal codes near Akaska within SD.

Frequently Asked Questions

What is the primary city for ZIP code 57420?

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

In which county is 57420 located?

ZIP code 57420 is situated within Walworth, SD.

What are the coordinates for 57420?

The approximate center point is 45.33240 (Latitude) and -100.11860 (Longitude).

Is ZIP code 57420 active?

This page lists ZIP 57420 as Listed based on the latest refresh date shown above.

Does ZIP 57420 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