Castell, TX ZIP code
The ZIP code for Castell, Texas is 76831. It is in Llano County.
- Population in these ZIPs
- 0
- Avg. median income
- —population-weighted
- Typical home value
- —population-weighted
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Castell, TX ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 76831 | 0 | — | — |
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
Cities near Castell
Frequently asked questions
What is the ZIP code for Castell, TX?
The ZIP code for Castell, TX is 76831.
What county is Castell, Texas in?
Castell ZIP codes are in Llano County.