In which county is ZIP code 57365 located?

ZIP 57365 is listed under Lyman, SD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 57365: Oacoma, SD

ZIP: 57365

County: Lyman

Coordinates: 43.79750, -99.39470

ZIP Type: Standard

Time Zone: Central Time (CT)

Get a reliable snapshot of the Oacoma, SD postal area 57365. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Oacoma
ZIP Code	57365
County	Lyman
State	SD
Latitude / Longitude	43.79750, -99.39470
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 57365 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 57365 is approximately 43.79750 (latitude) and -99.39470 (longitude). This location sits within Lyman, contributing to regional planning across SD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 57365 for mail delivery and general location reference in Lyman, SD.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Oacoma within SD.

Frequently Asked Questions

What is the primary city for ZIP code 57365?

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

In which county is 57365 located?

ZIP code 57365 is situated within Lyman, SD.

What are the coordinates for 57365?

The approximate center point is 43.79750 (Latitude) and -99.39470 (Longitude).

Is ZIP code 57365 active?

This page lists ZIP 57365 as Listed based on the latest refresh date shown above.

Does ZIP 57365 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