ZIP Code 18001 is located in Lehigh Valley Pennsylvania. 18001 is entirely within Lehigh County. Regionally, it is located in Metro Philadelphia.
| ZIP Code Name | Lehigh Valley |
| Primary County | Lehigh County |
| ZIP Code Type | PO Box |
| Current Time | EDT |
| Coordinates | 40.60230255,-75.47134399 |
| Adjacent ZIP Codes | |
| Region | Metro Philadelphia |
| Metropolitan/Micropolitan Stat Area | Allentown-Bethlehem-Easton, PA-NJ |
| Time Zone | Eastern Daylight Time |
| IANA Timezone | America/New_York |
| US Congressional Districts in 18001 | |
| Pennsylvania State Senate Districts in 18001 | |
| Pennsylvania State House of Representatives Districts in 18001 |