ZIP Codes in Norwalk, CT
Norwalk uses 5 ZIP codes, all in Western Connecticut County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 5 Norwalk ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 06850 | standard | Western Connecticut | 19,692 |
| 06851 | standard | Western Connecticut | 27,865 |
| 06853 | standard | Western Connecticut | 3,171 |
| 06854 | standard | Western Connecticut | 32,118 |
| 06855 | standard | Western Connecticut | 9,351 |
Finding a ZIP+4 in Norwalk
Knowing which of these 5 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 Norwalk street almost always have different ZIP+4 codes even though they share all five leading digits.
Appending ZIP+4 to a mailing list?
Upload a CSV of Norwalk addresses and download it complete.