ZIP Code 37840 — Oliver Springs, TN
37840 is a standard (street delivery) ZIP code serving Oliver Springs, Tennessee, in Morgan 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 37840 at a glance
| ZIP code | 37840 |
|---|---|
| Primary city | Oliver Springs |
| State | Tennessee (TN) |
| County | Morgan FIPS 47129 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 10,004 |
| Coordinates | 36.058490, -84.370470 |
How ZIP+4 works in 37840
The four digits after the hyphen encode a delivery segment inside 37840. 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 37840 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 37840.
| ZIP | City | Distance |
|---|---|---|
| 37719 | Coalfield, TN | 4.1 mi |
| 37845 | Petros, TN | 5.4 mi |
| 37710 | Briceville, TN | 7.5 mi |
| 37830 | Oak Ridge, TN | 7.8 mi |
| 37748 | Harriman, TN | 11.1 mi |
| 37716 | Clinton, TN | 11.6 mi |
| 37932 | Knoxville, TN | 13.5 mi |
| 37887 | Wartburg, TN | 13.7 mi |
| 37829 | Oakdale, TN | 14.1 mi |
| 37931 | Knoxville, TN | 14.8 mi |
| 37771 | Lenoir City, TN | 15.5 mi |
| 37714 | Caryville, TN | 15.8 mi |
Questions about 37840
What is the ZIP+4 code for 37840?
37840 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 37840, you need to look up a specific street address to get them.
What city is 37840?
37840 is assigned to Oliver Springs, Tennessee, in Morgan 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.