Humboldt, Illinois Zip code
The Zip code for Humboldt, Illinois is 61931.
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The official website of The United State Postal Service(USPS) is https://www.usps.com/.
- For more information about Illinois (U.S. state) see Illinois on Wikipedia
"The Zip code (Post Code) for Humboldt, Illinois, USA: 61931" is tagged with:
USPS Zip code
Illinois(U.S. state)
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