ZIP Code 42330 — Central City, KY
42330 is a standard (street delivery) ZIP code serving Central City, Kentucky, in Muhlenberg 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 42330 at a glance
| ZIP code | 42330 |
|---|---|
| Primary city | Central City |
| State | Kentucky (KY) |
| County | Muhlenberg FIPS 21177 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 9,367 |
| Coordinates | 37.314360, -87.122450 |
How ZIP+4 works in 42330
The four digits after the hyphen encode a delivery segment inside 42330. 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 42330 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 42330.
| ZIP | City | Distance |
|---|---|---|
| 42374 | South Carrollton, KY | 1.6 mi |
| 42332 | Cleaton, KY | 4.7 mi |
| 42367 | Powderly, KY | 5.3 mi |
| 42369 | Rockport, KY | 6.8 mi |
| 42326 | Browder, KY | 8.2 mi |
| 42325 | Bremen, KY | 8.3 mi |
| 42328 | Centertown, KY | 8.4 mi |
| 42337 | Drakesboro, KY | 9.2 mi |
| 42350 | Island, KY | 9.8 mi |
| 42321 | Beech Creek, KY | 10.1 mi |
| 42372 | Sacramento, KY | 10.6 mi |
| 42323 | Beechmont, KY | 10.9 mi |
Questions about 42330
What is the ZIP+4 code for 42330?
42330 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 42330, you need to look up a specific street address to get them.
What city is 42330?
42330 is assigned to Central City, Kentucky, in Muhlenberg 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.