| Locality | Post Code |
|---|---|
| Atwood, Kosciusko | 46502 |
| Burket, Kosciusko | 46508 |
| Claypool, Kosciusko | 46510 |
| Etna Green, Kosciusko | 46524 |
| Leesburg, Kosciusko | 46538 |
| Mentone, Kosciusko | 46539 |
| Milford, Kosciusko | 46542 |
| North Webster, Kosciusko | 46555 |
| Pierceton, Kosciusko | 46562 |
| Sidney, Kosciusko | 46562 |
| Silver Lake, Kosciusko | 46982 |
| Syracuse, Kosciusko | 46567 |
| Warsaw, Kosciusko | 46580, 46582 |
| Winona Lake, Kosciusko | 46590 |