ZIP Code 76831

ZIP code 76831 is classified by USPS as a standard delivery area and covers roughly 105.0 square miles in Castell, Llano County, Texas. The area is home to 63 residents, producing a population density of 1 people per square mile, and falls within the Chicago time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 76831 against Texas and the nation.

On the economic side, the median household income for ZIP 76831 sits at —, while per-capita income is —. The poverty rate stands at — and the unemployment rate at —. On housing, the median home value is — with median rent at — per month, and — of occupied units are owner-occupied, a direct signal of whether 76831 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: — of adults hold a bachelor's degree or higher, the median age is —, and the average commute is —. We also surface 1 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Llano County, so you can benchmark 76831 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →