ZIP Code 42303 — Owensboro, KY
42303 is a standard (street delivery) ZIP code serving Owensboro, Kentucky, in Daviess 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 42303 at a glance
| ZIP code | 42303 |
|---|---|
| Primary city | Owensboro |
| State | Kentucky (KY) |
| County | Daviess FIPS 21059 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 42,119 |
| Coordinates | 37.761380, -87.048890 |
How ZIP+4 works in 42303
The four digits after the hyphen encode a delivery segment inside 42303. 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 42303 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.
Other ZIP codes in Owensboro
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 42303.
| ZIP | City | Distance |
|---|---|---|
| 42366 | Philpot, KY | 6.5 mi |
| 42355 | Maceo, KY | 7.7 mi |
| 47635 | Rockport, IN | 9.2 mi |
| 42376 | Utica, KY | 10.2 mi |
| 42301 | Owensboro, KY | 10.9 mi |
| 42378 | Whitesville, KY | 12.3 mi |
| 42351 | Lewisport, KY | 13.4 mi |
| 47634 | Richland, IN | 14.3 mi |
| 47615 | Grandview, IN | 15.4 mi |
| 42356 | Maple Mount, KY | 15.7 mi |
| 42348 | Hawesville, KY | 16.2 mi |
| 42368 | Reynolds Station, KY | 16.6 mi |
Questions about 42303
What is the ZIP+4 code for 42303?
42303 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 42303, you need to look up a specific street address to get them.
What city is 42303?
42303 is assigned to Owensboro, Kentucky, in Daviess 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.