ZIP Code 37845 — Petros, TN
37845 is a standard (street delivery) ZIP code serving Petros, 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 37845 at a glance
| ZIP code | 37845 |
|---|---|
| Primary city | Petros |
| State | Tennessee (TN) |
| County | Morgan FIPS 47129 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 171 |
| Coordinates | 36.103690, -84.450220 |
How ZIP+4 works in 37845
The four digits after the hyphen encode a delivery segment inside 37845. 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 37845 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 37845.
| ZIP | City | Distance |
|---|---|---|
| 37840 | Oliver Springs, TN | 5.4 mi |
| 37719 | Coalfield, TN | 5.8 mi |
| 37710 | Briceville, TN | 8.3 mi |
| 37887 | Wartburg, TN | 9.4 mi |
| 37770 | Lancing, TN | 11.2 mi |
| 37748 | Harriman, TN | 11.3 mi |
| 37829 | Oakdale, TN | 11.5 mi |
| 37830 | Oak Ridge, TN | 13 mi |
| 37756 | Huntsville, TN | 13.9 mi |
| 37716 | Clinton, TN | 15.7 mi |
| 37714 | Caryville, TN | 15.7 mi |
| 37852 | Robbins, TN | 16.7 mi |
Questions about 37845
What is the ZIP+4 code for 37845?
37845 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 37845, you need to look up a specific street address to get them.
What city is 37845?
37845 is assigned to Petros, 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.