In which county is ZIP code 51545 located?

ZIP 51545 is listed under Harrison, IA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 51545: Little Sioux, IA

ZIP: 51545

County: Harrison

Coordinates: 41.80830, -96.03140

ZIP Type: Standard

Time Zone: Central Time (CT)

Get a reliable snapshot of the Little Sioux, IA postal area 51545. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Little Sioux
ZIP Code	51545
County	Harrison
State	IA
Latitude / Longitude	41.80830, -96.03140
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 51545 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 51545 is approximately 41.80830 (latitude) and -96.03140 (longitude). This location sits within Harrison, contributing to regional planning across IA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 51545 for mail delivery and general location reference in Harrison, IA.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Little Sioux within IA.

Frequently Asked Questions

What is the primary city for ZIP code 51545?

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

In which county is 51545 located?

ZIP code 51545 is situated within Harrison, IA.

What are the coordinates for 51545?

The approximate center point is 41.80830 (Latitude) and -96.03140 (Longitude).

Is ZIP code 51545 active?

This page lists ZIP 51545 as Listed based on the latest refresh date shown above.

Does ZIP 51545 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