ZIP Code 37171 — Southside, TN
37171 is a standard (street delivery) ZIP code serving Southside, Tennessee, in Montgomery 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 37171 at a glance
| ZIP code | 37171 |
|---|---|
| Primary city | Southside |
| State | Tennessee (TN) |
| County | Montgomery FIPS 47125 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,402 |
| Coordinates | 36.364420, -87.303650 |
How ZIP+4 works in 37171
The four digits after the hyphen encode a delivery segment inside 37171. 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 37171 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 37171.
| ZIP | City | Distance |
|---|---|---|
| 37052 | Cunningham, TN | 5.5 mi |
| 37051 | Cumberland Furnace, TN | 7.4 mi |
| 37036 | Charlotte, TN | 8.8 mi |
| 37035 | Chapmansboro, TN | 10 mi |
| 37043 | Clarksville, TN | 10.1 mi |
| 37165 | Slayden, TN | 10.5 mi |
| 37040 | Clarksville, TN | 11.1 mi |
| 37142 | Palmyra, TN | 11.4 mi |
| 37015 | Ashland City, TN | 13.4 mi |
| 37181 | Vanleer, TN | 13.7 mi |
| 37042 | Clarksville, TN | 15.3 mi |
| 37146 | Pleasant View, TN | 15.4 mi |
Questions about 37171
What is the ZIP+4 code for 37171?
37171 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 37171, you need to look up a specific street address to get them.
What city is 37171?
37171 is assigned to Southside, Tennessee, in Montgomery 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.