ZIP Code 42134 — Franklin, KY
42134 is a standard (street delivery) ZIP code serving Franklin, Kentucky, in Simpson 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 42134 at a glance
| ZIP code | 42134 |
|---|---|
| Primary city | Franklin |
| State | Kentucky (KY) |
| County | Simpson FIPS 21213 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 19,380 |
| Coordinates | 36.726260, -86.564330 |
How ZIP+4 works in 42134
The four digits after the hyphen encode a delivery segment inside 42134. 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 42134 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 42134.
| ZIP | City | Distance |
|---|---|---|
| 42170 | Woodburn, KY | 8.3 mi |
| 37141 | Orlinda, TN | 10.7 mi |
| 37148 | Portland, TN | 10.9 mi |
| 42104 | Bowling Green, KY | 12.1 mi |
| 37049 | Cross Plains, TN | 13.1 mi |
| 42206 | Auburn, KY | 13.9 mi |
| 42122 | Alvaton, KY | 14.7 mi |
| 42274 | Rockfield, KY | 15.5 mi |
| 37048 | Cottontown, TN | 16.3 mi |
| 42202 | Adairville, KY | 16.5 mi |
| 42120 | Adolphus, KY | 16.5 mi |
| 37188 | White House, TN | 18.1 mi |
Questions about 42134
What is the ZIP+4 code for 42134?
42134 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 42134, you need to look up a specific street address to get them.
What city is 42134?
42134 is assigned to Franklin, Kentucky, in Simpson 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.