ZIP Code 63040 — Wildwood, MO
63040 is a standard (street delivery) ZIP code serving Wildwood, Missouri, in St. Louis County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 63040 at a glance
| ZIP code | 63040 |
|---|---|
| Primary city | Wildwood |
| State | Missouri (MO) |
| County | St. Louis FIPS 29189 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 8,526 |
| Coordinates | 38.572980, -90.635120 |
How ZIP+4 works in 63040
The four digits after the hyphen encode a delivery segment inside 63040. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 63040 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Other ZIP codes in Wildwood
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 63040.
| ZIP | City | Distance |
|---|---|---|
| 63038 | Wildwood, MO | 2 mi |
| 63011 | Ballwin, MO | 4.6 mi |
| 63021 | Ballwin, MO | 4.8 mi |
| 63005 | Chesterfield, MO | 4.9 mi |
| 63025 | Eureka, MO | 5.8 mi |
| 63073 | Saint Albans, MO | 7.3 mi |
| 63088 | Valley Park, MO | 7.4 mi |
| 63017 | Chesterfield, MO | 7.6 mi |
| 63069 | Pacific, MO | 8 mi |
| 63049 | High Ridge, MO | 8.7 mi |
| 63304 | Saint Charles, MO | 9.6 mi |
| 63026 | Fenton, MO | 10.6 mi |
Questions about 63040
What is the ZIP+4 code for 63040?
63040 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 63040, you need to look up a specific street address to get them.
What city is 63040?
63040 is assigned to Wildwood, Missouri, in St. Louis County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.