ZIP Code 63376 — Saint Peters, MO
63376 is a standard (street delivery) ZIP code serving Saint Peters, Missouri, in St. Charles 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 63376 at a glance
| ZIP code | 63376 |
|---|---|
| Primary city | Saint Peters |
| State | Missouri (MO) |
| County | St. Charles FIPS 29183 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 74,962 |
| Coordinates | 38.800220, -90.616360 |
How ZIP+4 works in 63376
The four digits after the hyphen encode a delivery segment inside 63376. 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 63376 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.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 63376.
| ZIP | City | Distance |
|---|---|---|
| 63303 | Saint Charles, MO | 5.7 mi |
| 63368 | O'fallon, MO | 6.9 mi |
| 63366 | O'fallon, MO | 6.9 mi |
| 63304 | Saint Charles, MO | 7.5 mi |
| 62036 | Golden Eagle, IL | 8.3 mi |
| 63045 | Earth City, MO | 8.4 mi |
| 63301 | Saint Charles, MO | 8.8 mi |
| 63367 | Lake Saint Louis, MO | 9.7 mi |
| 63043 | Maryland Heights, MO | 9.9 mi |
| 63146 | Saint Louis, MO | 10.2 mi |
| 63044 | Bridgeton, MO | 10.3 mi |
| 63005 | Chesterfield, MO | 11 mi |
Questions about 63376
What is the ZIP+4 code for 63376?
63376 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 63376, you need to look up a specific street address to get them.
What city is 63376?
63376 is assigned to Saint Peters, Missouri, in St. Charles 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.