ZIP Code 37681 — Limestone, TN
37681 is a standard (street delivery) ZIP code serving Limestone, Tennessee, in Washington 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 37681 at a glance
| ZIP code | 37681 |
|---|---|
| Primary city | Limestone |
| State | Tennessee (TN) |
| County | Washington FIPS 47179 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 5,723 |
| Coordinates | 36.254650, -82.626720 |
How ZIP+4 works in 37681
The four digits after the hyphen encode a delivery segment inside 37681. 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 37681 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 37681.
| ZIP | City | Distance |
|---|---|---|
| 37690 | Telford, TN | 3.8 mi |
| 37641 | Chuckey, TN | 4.3 mi |
| 37616 | Afton, TN | 7.1 mi |
| 37659 | Jonesborough, TN | 7.6 mi |
| 37656 | Fall Branch, TN | 10 mi |
| 37745 | Greeneville, TN | 11.2 mi |
| 37615 | Johnson City, TN | 13.8 mi |
| 37650 | Erwin, TN | 13.9 mi |
| 37604 | Johnson City, TN | 13.9 mi |
| 37614 | Johnson City, TN | 14.8 mi |
| 37663 | Kingsport, TN | 16.5 mi |
| 37657 | Flag Pond, TN | 16.8 mi |
Questions about 37681
What is the ZIP+4 code for 37681?
37681 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 37681, you need to look up a specific street address to get them.
What city is 37681?
37681 is assigned to Limestone, Tennessee, in Washington 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.