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Post Offices in Mazon, IL
1 post office in Mazon, Grundy County · Data as of 09/23/2026
Post offices on this page
Post offices in Mazon at a glance
- Mazon has 1 post office, about 7.1 for every 10,000 residents.
- By count, it is 100th of 1,142 in Illinois.
- Nearby, Coal City (1), Gardner (1) and Kinsman (1) also have post offices listed.
Post offices in Mazon
A to Z
Frequently asked questions
- How many post offices are in Mazon, IL?
- There is 1 post office in Mazon as of 09/23/2026.