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Post Offices in Illiopolis, IL
1 post office in Illiopolis, Sangamon County · Data as of 09/23/2026
Post offices on this page
Post offices in Illiopolis at a glance
- There is 1 post office in Illiopolis, or roughly one for every 890 people.
- It ranks 100th among 1,142 Illinois cities by number of post offices.
- Close by, Springfield (6), Auburn (1) and Buffalo (1) have post offices as well.
Post offices in Illiopolis
A to Z
Frequently asked questions
- How many post offices are in Illiopolis, IL?
- There is 1 post office in Illiopolis as of 09/23/2026.