ZIP Code 37318 — Cowan, TN
37318 is a standard (street delivery) ZIP code serving Cowan, Tennessee, in Franklin 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 37318 at a glance
| ZIP code | 37318 |
|---|---|
| Primary city | Cowan |
| State | Tennessee (TN) |
| County | Franklin FIPS 47051 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,103 |
| Coordinates | 35.178790, -85.979940 |
How ZIP+4 works in 37318
The four digits after the hyphen encode a delivery segment inside 37318. 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 37318 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 37318.
| ZIP | City | Distance |
|---|---|---|
| 37383 | Sewanee, TN | 4.3 mi |
| 37324 | Decherd, TN | 5.2 mi |
| 37375 | Sewanee, TN | 5.8 mi |
| 37398 | Winchester, TN | 8.9 mi |
| 37376 | Sherwood, TN | 9.1 mi |
| 37356 | Monteagle, TN | 9.5 mi |
| 37330 | Estill Springs, TN | 11.1 mi |
| 37366 | Pelham, TN | 12.5 mi |
| 37306 | Belvidere, TN | 13.1 mi |
| 37342 | Hillsboro, TN | 14.1 mi |
| 37380 | South Pittsburg, TN | 14.5 mi |
| 37387 | Tracy City, TN | 16.5 mi |
Questions about 37318
What is the ZIP+4 code for 37318?
37318 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 37318, you need to look up a specific street address to get them.
What city is 37318?
37318 is assigned to Cowan, Tennessee, in Franklin 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.