ZIP Codes in Norristown, PA
Norristown uses 2 ZIP codes, all in Montgomery County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 2 Norristown ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 19401 | standard | Montgomery | 43,359 |
| 19403 | standard | Montgomery | 44,017 |
Finding a ZIP+4 in Norristown
Knowing which of these 2 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 Norristown street almost always have different ZIP+4 codes even though they share all five leading digits.
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