100 Smallest ZIP Codes in the United States by Population in Mason County, Illinois
Explore the 100 smallest ZIP codes in the United States ranked by population using U.S. Census demographic data. This page lists ZIP codes located in Mason County, Illinois.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 61532 | FOREST CITY | IL | 410 |
| 2 | 62617 | BATH | IL | 478 |
| 3 | 61567 | TOPEKA | IL | 500 |
| 4 | 62633 | EASTON | IL | 603 |
| 5 | 62655 | KILBOURNE | IL | 719 |
| 6 | 62682 | SAN JOSE | IL | 751 |
| 7 | 62664 | MASON CITY | IL | 2,945 |
| 8 | 61546 | MANITO | IL | 3,791 |
| 9 | 62644 | HAVANA | IL | 4,690 |