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U.S. ZIP Code 73855
5-digit United States postal code #73855, Rosston, OK
ZIP code 73855 is located in the city (place name) Rosston, сounty Harper in the state of Oklahoma. The population in ZIP code 73855 is 106 and the population density is 0.3. ZIP code 73855 refers to сounty Harper having сounty FIPS 40059, the ratio of people from different counties in this ZIP code is as follows: all county weights - 40059: 100%. In the area of the ZIP code 73855 valid time zone America/Chicago.