In which county is ZIP code 77989 located?

ZIP 77989 is listed under DeWitt, TX.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 77989: Thomaston, TX

ZIP: 77989

County: DeWitt

Coordinates: 28.99740, -97.15390

ZIP Type: Standard

Time Zone: Central Time (CT)

Get a reliable snapshot of the Thomaston, TX postal area 77989. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Thomaston
ZIP Code	77989
County	DeWitt
State	TX
Latitude / Longitude	28.99740, -97.15390
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 77989 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 77989 is approximately 28.99740 (latitude) and -97.15390 (longitude). This location sits within DeWitt, contributing to regional planning across TX.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 77989 for mail delivery and general location reference in DeWitt, TX.

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

Related ZIP Codes (Nearby)

Explore other postal codes near Thomaston within TX.

Frequently Asked Questions

What is the primary city for ZIP code 77989?

The primary city for this ZIP code is Thomaston, located in TX.

In which county is 77989 located?

ZIP code 77989 is situated within DeWitt, TX.

What are the coordinates for 77989?

The approximate center point is 28.99740 (Latitude) and -97.15390 (Longitude).

Is ZIP code 77989 active?

This page lists ZIP 77989 as Listed based on the latest refresh date shown above.

Does ZIP 77989 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