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U.S. ZIP Code 78338
5-digit United States postal code #78338, Armstrong, TX
ZIP code 78338 is located in the city (place name) Armstrong, сounty Kenedy in the state of Texas. The population in ZIP code 78338 is 37 and the population density is 0.6. ZIP code 78338 refers to сounty Kenedy having сounty FIPS 48261, the ratio of people from different counties in this ZIP code is as follows: all county weights - 48261: 100%. In the area of the ZIP code 78338 valid time zone America/Chicago.