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U.S. ZIP Code 76831
5-digit United States postal code #76831, Castell, TX
ZIP code 76831 is located in the city (place name) Castell, сounty Llano in the state of Texas. The population in ZIP code 76831 is 63 and the population density is 0.6. ZIP code 76831 refers to сounty Llano having сounty FIPS 48299, the ratio of people from different counties in this ZIP code is as follows: all county weights - 48299: 100%. In the area of the ZIP code 76831 valid time zone America/Chicago.