ZIP Code 37748 — Harriman, TN
37748 is a standard (street delivery) ZIP code serving Harriman, Tennessee, in Roane 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 37748 at a glance
| ZIP code | 37748 |
|---|---|
| Primary city | Harriman |
| State | Tennessee (TN) |
| County | Roane FIPS 47145 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 17,575 |
| Coordinates | 35.947970, -84.514130 |
How ZIP+4 works in 37748
The four digits after the hyphen encode a delivery segment inside 37748. 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 37748 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 37748.
| ZIP | City | Distance |
|---|---|---|
| 37829 | Oakdale, TN | 6.6 mi |
| 37719 | Coalfield, TN | 7 mi |
| 37763 | Kingston, TN | 8.7 mi |
| 37887 | Wartburg, TN | 10.6 mi |
| 37840 | Oliver Springs, TN | 11.1 mi |
| 37845 | Petros, TN | 11.3 mi |
| 37854 | Rockwood, TN | 12.1 mi |
| 37830 | Oak Ridge, TN | 12.4 mi |
| 37771 | Lenoir City, TN | 13.3 mi |
| 37770 | Lancing, TN | 15.8 mi |
| 37723 | Crab Orchard, TN | 17.2 mi |
| 37774 | Loudon, TN | 17.4 mi |
Questions about 37748
What is the ZIP+4 code for 37748?
37748 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 37748, you need to look up a specific street address to get them.
What city is 37748?
37748 is assigned to Harriman, Tennessee, in Roane 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.