In which county is ZIP code 59631 located?

ZIP 59631 is listed under Jefferson, MT.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 59631: Basin, MT

ZIP: 59631

County: Jefferson

Coordinates: 46.32960, -112.19670

ZIP Type: Standard

Time Zone: Mountain Time (MT)

Get a reliable snapshot of the Basin, MT postal area 59631. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Basin
ZIP Code	59631
County	Jefferson
State	MT
Latitude / Longitude	46.32960, -112.19670
ZIP Type	Standard
Time Zone	Mountain Time (MT)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 59631 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 59631 is approximately 46.32960 (latitude) and -112.19670 (longitude). This location sits within Jefferson, contributing to regional planning across MT.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 59631 for mail delivery and general location reference in Jefferson, MT.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Basin within MT.

Frequently Asked Questions

What is the primary city for ZIP code 59631?

The primary city for this ZIP code is Basin, located in MT.

In which county is 59631 located?

ZIP code 59631 is situated within Jefferson, MT.

What are the coordinates for 59631?

The approximate center point is 46.32960 (Latitude) and -112.19670 (Longitude).

Is ZIP code 59631 active?

This page lists ZIP 59631 as Listed based on the latest refresh date shown above.

Does ZIP 59631 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