ZIP Code 76831: Castell, TX
County: Llano
Coordinates: 30.75650, -98.97120
ZIP Type: Standard
Time Zone: Central Time (CT)
Get a reliable snapshot of the Castell, TX postal area 76831. This page summarizes county, coordinates, and local facts to help with services and location research.
| Primary City | Castell |
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| ZIP Code | 76831 |
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| County | Llano |
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| State | TX |
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| Latitude / Longitude | 30.75650, -98.97120 |
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| ZIP Type | Standard |
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| Time Zone | Central Time (CT) |
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| Data Updated | 2026-01-08 |
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Maps & Useful Links
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These links show the approximate center point for ZIP 76831 (not an exact boundary).
Geographic & Administrative Context
The geographic center of ZIP code 76831 is approximately 30.75650 (latitude) and -98.97120 (longitude). This location sits within Llano, contributing to regional planning across TX.
Local Coverage Notes
ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 76831 for mail delivery and general location reference in
Llano,
TX.
This ZIP may extend beyond the city core into nearby communities within Llano.
Related ZIP Codes (Nearby)
Explore other postal codes near Castell within TX.
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Frequently Asked Questions
What is the primary city for ZIP code 76831?
The primary city for this ZIP code is Castell, located in TX.
In which county is 76831 located?
ZIP code 76831 is situated within Llano, TX.
What are the coordinates for 76831?
The approximate center point is 30.75650 (Latitude) and -98.97120 (Longitude).
Is ZIP code 76831 active?
This page lists ZIP 76831 as Listed based on the latest refresh date shown above.
Does ZIP 76831 cover multiple areas?
Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.
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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