ZIP Code 37891 — Whitesburg, TN
37891 is a standard (street delivery) ZIP code serving Whitesburg, Tennessee, in Hamblen 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 37891 at a glance
| ZIP code | 37891 |
|---|---|
| Primary city | Whitesburg |
| State | Tennessee (TN) |
| County | Hamblen FIPS 47063 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,671 |
| Coordinates | 36.291720, -83.139920 |
How ZIP+4 works in 37891
The four digits after the hyphen encode a delivery segment inside 37891. 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 37891 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 37891.
| ZIP | City | Distance |
|---|---|---|
| 37860 | Russellville, TN | 4.1 mi |
| 37711 | Bulls Gap, TN | 5.7 mi |
| 37811 | Mooresburg, TN | 6 mi |
| 37810 | Mohawk, TN | 8 mi |
| 37813 | Morristown, TN | 10.6 mi |
| 37708 | Bean Station, TN | 11.1 mi |
| 37809 | Midway, TN | 11.1 mi |
| 37814 | Morristown, TN | 11.3 mi |
| 37818 | Mosheim, TN | 11.8 mi |
| 37881 | Thorn Hill, TN | 13.5 mi |
| 37713 | Bybee, TN | 13.9 mi |
| 37857 | Rogersville, TN | 14.2 mi |
Questions about 37891
What is the ZIP+4 code for 37891?
37891 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 37891, you need to look up a specific street address to get them.
What city is 37891?
37891 is assigned to Whitesburg, Tennessee, in Hamblen 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.