In which county is ZIP code 81638 located?

ZIP 81638 is listed under Moffat, CO.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 81638: Hamilton, CO

ZIP: 81638

County: Moffat

Coordinates: 40.32500, -107.58410

ZIP Type: Standard

Time Zone: Mountain Time (MT)

Get a reliable snapshot of the Hamilton, CO postal area 81638. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Hamilton
ZIP Code	81638
County	Moffat
State	CO
Latitude / Longitude	40.32500, -107.58410
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 81638 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 81638 is approximately 40.32500 (latitude) and -107.58410 (longitude). This location sits within Moffat, contributing to regional planning across CO.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 81638 for mail delivery and general location reference in Moffat, CO.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Hamilton within CO.

Frequently Asked Questions

What is the primary city for ZIP code 81638?

The primary city for this ZIP code is Hamilton, located in CO.

In which county is 81638 located?

ZIP code 81638 is situated within Moffat, CO.

What are the coordinates for 81638?

The approximate center point is 40.32500 (Latitude) and -107.58410 (Longitude).

Is ZIP code 81638 active?

This page lists ZIP 81638 as Listed based on the latest refresh date shown above.

Does ZIP 81638 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