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U.S. ZIP Code 73556
5-digit United States postal code #73556, Martha, OK
ZIP code 73556 is located in the city (place name) Martha, сounty Jackson in the state of Oklahoma. The population in ZIP code 73556 is 166 and the population density is 44.5. ZIP code 73556 refers to сounty Jackson having сounty FIPS 40065, the ratio of people from different counties in this ZIP code is as follows: all county weights - 40065: 100%. In the area of the ZIP code 73556 valid time zone America/Chicago.