76831 ZIP Code — Castell, TX
Llano County, Texas
ZIP code 76831 is located in Castell, Texas, within Llano County. It covers approximately 8.21 square miles and serves a population of 0 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 325.
0
population
8.21
sq mi land
Standard
ZIP type
Central (CT)
timezone
76831 ZIP code map
Cities in ZIP code 76831
Below are the cities the US Postal Service accepts for ZIP code 76831. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Castell | Preferred |
Nearby ZIP codes
76820 Art (9.1 mi)
76885 Valley Spring (9.8 mi)
76869 Pontotoc (12.2 mi)
78643 Llano (15.6 mi)
76856 Mason (18.1 mi)
76842 Fredonia (18.8 mi)
Demographics
updated 06/2026
| Population | |
|---|---|
| Total population | 0 |
| Population density | 0 / sq mi |
| State FIPS | 48 |
| County FIPS | 299 |
| Geography | |
|---|---|
| Land area | 8.21 sq mi |
| Water area | 0.02 sq mi |
| Latitude | 30.7128 |
| Longitude | -98.9190 |
| Timezone | Central (CT) |
| Area code | 325 |