ZIP Code 40045 — Milton, KY
40045 is a standard (street delivery) ZIP code serving Milton, Kentucky, in Trimble 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 40045 at a glance
| ZIP code | 40045 |
|---|---|
| Primary city | Milton |
| State | Kentucky (KY) |
| County | Trimble FIPS 21223 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,251 |
| Coordinates | 38.693760, -85.356410 |
How ZIP+4 works in 40045
The four digits after the hyphen encode a delivery segment inside 40045. 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 40045 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 40045.
| ZIP | City | Distance |
|---|---|---|
| 40006 | Bedford, KY | 6.9 mi |
| 47243 | Hanover, IN | 6.9 mi |
| 47250 | Madison, IN | 8.6 mi |
| 41008 | Carrollton, KY | 10.4 mi |
| 47104 | Bethlehem, IN | 11.1 mi |
| 47162 | New Washington, IN | 11.9 mi |
| 47147 | Nabb, IN | 12 mi |
| 47138 | Lexington, IN | 13 mi |
| 40055 | Pendleton, KY | 13.5 mi |
| 40077 | Westport, KY | 14.1 mi |
| 40011 | Campbellsburg, KY | 15 mi |
| 47224 | Canaan, IN | 15.2 mi |
Questions about 40045
What is the ZIP+4 code for 40045?
40045 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 40045, you need to look up a specific street address to get them.
What city is 40045?
40045 is assigned to Milton, Kentucky, in Trimble 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.