| Locality | Post Code |
|---|---|
| Bradford, Harrison | 47107 |
| Central, Harrison | 47110 |
| Corydon, Harrison | 47112 |
| Crandall, Harrison | 47114 |
| Depauw, Harrison | 47115 |
| Elizabeth, Harrison | 47117 |
| Laconia, Harrison | 47135 |
| Lanesville, Harrison | 47136 |
| Mauckport, Harrison | 47142 |
| New Amsterdam, Harrison | 47110 |
| New Middletown, Harrison | 47160 |
| New Salisbury, Harrison | 47161 |
| Palmyra, Harrison | 47164 |
| Ramsey, Harrison | 47166 |
| Rosewood, Harrison | 47117 |