In which county is ZIP code 51103 located?

ZIP 51103 is listed under Woodbury, IA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 51103: Sioux City, IA

ZIP: 51103

County: Woodbury

Coordinates: 42.50680, -96.42950

ZIP Type: Standard

Time Zone: Central Time (CT)

Explore detailed information for ZIP code 51103 in Sioux City, IA. We include verified county details for Woodbury plus key geographic references used for mapping and logistics.

Primary City	Sioux City
ZIP Code	51103
County	Woodbury
State	IA
Latitude / Longitude	42.50680, -96.42950
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 51103 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 51103 are listed as 42.50680 / -96.42950, useful for GPS and service checks in and around Sioux City, IA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 51103 for mail delivery and general location reference in Woodbury, IA.

Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Sioux City.

Related ZIP Codes (Nearby)

Explore other postal codes near Sioux City within IA.

Frequently Asked Questions

What is the primary city for ZIP code 51103?

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

In which county is 51103 located?

ZIP code 51103 is situated within Woodbury, IA.

What are the coordinates for 51103?

The approximate center point is 42.50680 (Latitude) and -96.42950 (Longitude).

Is ZIP code 51103 active?

This page lists ZIP 51103 as Listed based on the latest refresh date shown above.

Does ZIP 51103 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