ZIP Code 63673 — Saint Mary, MO
63673 is a standard (street delivery) ZIP code serving Saint Mary, Missouri, in Ste. Genevieve 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 63673 at a glance
| ZIP code | 63673 |
|---|---|
| Primary city | Saint Mary |
| State | Missouri (MO) |
| County | Ste. Genevieve FIPS 29186 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,340 |
| Coordinates | 37.836410, -89.988610 |
How ZIP+4 works in 63673
The four digits after the hyphen encode a delivery segment inside 63673. 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 63673 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 63673.
| ZIP | City | Distance |
|---|---|---|
| 63670 | Sainte Genevieve, MO | 10.3 mi |
| 63775 | Perryville, MO | 10.5 mi |
| 62261 | Modoc, IL | 12.1 mi |
| 62233 | Chester, IL | 12.9 mi |
| 62241 | Ellis Grove, IL | 13.5 mi |
| 62297 | Walsh, IL | 17.6 mi |
| 62242 | Evansville, IL | 17.8 mi |
| 62280 | Rockwood, IL | 17.9 mi |
| 63746 | Farrar, MO | 18.3 mi |
| 62277 | Prairie Du Rocher, IL | 19.3 mi |
| 62288 | Steeleville, IL | 19.5 mi |
| 63627 | Bloomsdale, MO | 19.9 mi |
Questions about 63673
What is the ZIP+4 code for 63673?
63673 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 63673, you need to look up a specific street address to get them.
What city is 63673?
63673 is assigned to Saint Mary, Missouri, in Ste. Genevieve 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.