In which county is ZIP code 51010 located?

ZIP 51010 is listed under Monona, IA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 51010: Castana, IA

ZIP: 51010

County: Monona

Coordinates: 42.07440, -95.90860

ZIP Type: Standard

Time Zone: Central Time (CT)

Explore detailed information for ZIP code 51010 in Castana, IA. We include verified county details for Monona plus key geographic references used for mapping and logistics.

Primary City	Castana
ZIP Code	51010
County	Monona
State	IA
Latitude / Longitude	42.07440, -95.90860
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 51010 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 51010 is approximately 42.07440 (latitude) and -95.90860 (longitude). This location sits within Monona, contributing to regional planning across IA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 51010 for mail delivery and general location reference in Monona, IA.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Castana within IA.

Frequently Asked Questions

What is the primary city for ZIP code 51010?

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

In which county is 51010 located?

ZIP code 51010 is situated within Monona, IA.

What are the coordinates for 51010?

The approximate center point is 42.07440 (Latitude) and -95.90860 (Longitude).

Is ZIP code 51010 active?

This page lists ZIP 51010 as Listed based on the latest refresh date shown above.

Does ZIP 51010 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