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U.S. ZIP Code 66538
5-digit United States postal code #66538, Seneca, KS
ZIP code 66538 is located in the city (place name) Seneca, сounty Nemaha in the state of Kansas. The population in ZIP code 66538 is 3264 and the population density is 8.6. ZIP code 66538 refers to сounty Nemaha having сounty FIPS 20131, the ratio of people from different counties in this ZIP code is as follows: all county weights - 20131: 100%. In the area of the ZIP code 66538 valid time zone America/Chicago.