ZIP Codes in Chesterfield, MO
Chesterfield uses 2 ZIP codes, all in St. Louis County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 2 Chesterfield ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 63005 | standard | St. Louis | 19,779 |
| 63017 | standard | St. Louis | 43,243 |
Finding a ZIP+4 in Chesterfield
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 Chesterfield 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 Chesterfield addresses and download it complete.