In which county is ZIP code 57049 located?

ZIP 57049 is listed under Union, SD.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 57049: North Sioux City, SD

ZIP: 57049

County: Union

Coordinates: 42.52490, -96.50740

ZIP Type: Standard

Time Zone: Central Time (CT)

This profile provides an in-depth look at ZIP code 57049, serving North Sioux City in SD. It lies in Union and supports delivery, planning, and address verification.

Primary City	North Sioux City
ZIP Code	57049
County	Union
State	SD
Latitude / Longitude	42.52490, -96.50740
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 57049 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 57049 are listed as 42.52490 / -96.50740, useful for GPS and service checks in and around North Sioux City, SD.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 57049 for mail delivery and general location reference in Union, SD.

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

Related ZIP Codes (Nearby)

Explore other postal codes near North Sioux City within SD.

Frequently Asked Questions

What is the primary city for ZIP code 57049?

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

In which county is 57049 located?

ZIP code 57049 is situated within Union, SD.

What are the coordinates for 57049?

The approximate center point is 42.52490 (Latitude) and -96.50740 (Longitude).

Is ZIP code 57049 active?

This page lists ZIP 57049 as Listed based on the latest refresh date shown above.

Does ZIP 57049 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