In which county is ZIP code 51561 located?

ZIP 51561 is listed under Mills, IA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 51561: Pacific Junction, IA

ZIP: 51561

County: Mills

Coordinates: 41.02710, -95.80460

ZIP Type: Standard

Time Zone: Central Time (CT)

This profile provides an in-depth look at ZIP code 51561, serving Pacific Junction in IA. It lies in Mills and supports delivery, planning, and address verification.

Primary City	Pacific Junction
ZIP Code	51561
County	Mills
State	IA
Latitude / Longitude	41.02710, -95.80460
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 51561 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 51561 are listed as 41.02710 / -95.80460, useful for GPS and service checks in and around Pacific Junction, IA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 51561 for mail delivery and general location reference in Mills, IA.

Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Pacific Junction.

Related ZIP Codes (Nearby)

Explore other postal codes near Pacific Junction within IA.

Frequently Asked Questions

What is the primary city for ZIP code 51561?

The primary city for this ZIP code is Pacific Junction, located in IA.

In which county is 51561 located?

ZIP code 51561 is situated within Mills, IA.

What are the coordinates for 51561?

The approximate center point is 41.02710 (Latitude) and -95.80460 (Longitude).

Is ZIP code 51561 active?

This page lists ZIP 51561 as Listed based on the latest refresh date shown above.

Does ZIP 51561 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