100 Smallest ZIP Codes in the United States by Population in Hardin County, Ohio
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 Hardin County, Ohio.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 43346 | ROUNDHEAD | OH | 201 |
| 2 | 45859 | MC GUFFEY | OH | 380 |
| 3 | 45835 | DOLA | OH | 428 |
| 4 | 43345 | RIDGEWAY | OH | 851 |
| 5 | 45836 | DUNKIRK | OH | 1,435 |
| 6 | 45812 | ALGER | OH | 1,881 |
| 7 | 43340 | MOUNT VICTORY | OH | 2,001 |
| 8 | 45843 | FOREST | OH | 3,769 |
| 9 | 45810 | ADA | OH | 7,654 |
| 10 | 43326 | KENTON | OH | 12,990 |