In which county is ZIP code 51640 located?

ZIP 51640 is listed under Fremont, IA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 51640: Hamburg, IA

ZIP: 51640

County: Fremont

Coordinates: 40.61490, -95.62580

ZIP Type: Standard

Time Zone: Central Time (CT)

Get a reliable snapshot of the Hamburg, IA postal area 51640. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Hamburg
ZIP Code	51640
County	Fremont
State	IA
Latitude / Longitude	40.61490, -95.62580
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 51640 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 51640 are listed as 40.61490 / -95.62580, useful for GPS and service checks in and around Hamburg, IA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 51640 for mail delivery and general location reference in Fremont, IA.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Hamburg within IA.

Frequently Asked Questions

What is the primary city for ZIP code 51640?

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

In which county is 51640 located?

ZIP code 51640 is situated within Fremont, IA.

What are the coordinates for 51640?

The approximate center point is 40.61490 (Latitude) and -95.62580 (Longitude).

Is ZIP code 51640 active?

This page lists ZIP 51640 as Listed based on the latest refresh date shown above.

Does ZIP 51640 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