ZIP code 76831: Castell, TX
76831 is a ZIP code in Castell, Texas, mainly in Llano County.
- Population
- 0
- Median household income
- —
- Typical home value
- —
- Median rent
- —gross, per month
- Median age
- —
- Homeowners
- —of occupied homes
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Shaded: ZIP code 76831's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 76831 details
| City | Castell |
|---|---|
| State | Texas |
| County | Llano County |
| Metro area | Not in a metro or micro area |
| Time zone | Central Time (UTC−6), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 8.2 sq mi, plus 0 sq mi of water |
| Center coordinates | 30.75756, -98.95779 |
ZIP codes near 76831
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 76820 | Art, TX | 5.3 mi | 104 |
| 76885 | Valley Spring, TX | 9.0 mi | 142 |
| 76869 | Pontotoc, TX | 10.6 mi | 0 |
| 76842 | Fredonia, TX | 14.3 mi | 297 |
| 78643 | Llano, TX | 15.4 mi | 7,088 |
| 76832 | Cherokee, TX | 18.9 mi | 544 |
| 76856 | Mason, TX | 19.3 mi | 3,532 |
| 76887 | Voca, TX | 22.4 mi | 87 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
About ZIP code 76831
What city is ZIP code 76831?
ZIP code 76831 is in Castell, TX, in Llano County.
What county is ZIP code 76831 in?
76831 is mainly in Llano County, Texas.
What time zone is ZIP code 76831 in?
76831 is in Central Time (UTC−6). It observes daylight saving time.