3220 is the Postal Code/ZIP Code for the of San Isidro in the El Salvador Department of Morazán and the Municipality of San Isidro (Morazán).
| Postal Code | 3220 |
| Postal Code Name | San Isidro |
| Department | Morazán Department |
| Municipality | San Isidro (Morazán) Municipality |
| Timezone | Central Standard Time (CST) |
| Adjacent Postal Codes | 3208 3221 3224 3316 |