ZIP Code 40003 — Bagdad, KY
40003 is a standard (street delivery) ZIP code serving Bagdad, Kentucky, in Shelby 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 40003 at a glance
| ZIP code | 40003 |
|---|---|
| Primary city | Bagdad |
| State | Kentucky (KY) |
| County | Shelby FIPS 21211 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,807 |
| Coordinates | 38.268630, -85.043670 |
How ZIP+4 works in 40003
The four digits after the hyphen encode a delivery segment inside 40003. 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 40003 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 40003.
| ZIP | City | Distance |
|---|---|---|
| 40057 | Pleasureville, KY | 8.1 mi |
| 40601 | Frankfort, KY | 9 mi |
| 40065 | Shelbyville, KY | 9.7 mi |
| 40019 | Eminence, KY | 10.2 mi |
| 40076 | Waddy, KY | 11 mi |
| 40036 | Lockport, KY | 12.6 mi |
| 40007 | Bethlehem, KY | 12.9 mi |
| 40058 | Port Royal, KY | 13.2 mi |
| 40050 | New Castle, KY | 14.2 mi |
| 40068 | Smithfield, KY | 14.9 mi |
| 40363 | Perry Park, KY | 17.1 mi |
| 40067 | Simpsonville, KY | 17.6 mi |
Questions about 40003
What is the ZIP+4 code for 40003?
40003 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 40003, you need to look up a specific street address to get them.
What city is 40003?
40003 is assigned to Bagdad, Kentucky, in Shelby 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.