ZIP Codes in Bethlehem, PA
Bethlehem uses 4 ZIP codes, all in Northampton, Lehigh Counties. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 4 Bethlehem ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 18015 | standard | Northampton | 34,852 |
| 18017 | standard | Northampton | 40,640 |
| 18018 | standard | Lehigh | 32,965 |
| 18020 | standard | Northampton | 21,204 |
Finding a ZIP+4 in Bethlehem
Knowing which of these 4 ZIP codes covers an address only gets you partway. The four-digit extension identifies the specific delivery point — typically one side of one block. Two houses facing each other on the same Bethlehem street almost always have different ZIP+4 codes even though they share all five leading digits.
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