ZIP Code 45504 — Springfield, OH
45504 is a standard (street delivery) ZIP code serving Springfield, Ohio, in Clark 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 45504 at a glance
| ZIP code | 45504 |
|---|---|
| Primary city | Springfield |
| State | Ohio (OH) |
| County | Clark FIPS 39023 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 16,363 |
| Coordinates | 39.948110, -83.864810 |
How ZIP+4 works in 45504
The four digits after the hyphen encode a delivery segment inside 45504. 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 45504 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 Springfield
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 45504.
| ZIP | City | Distance |
|---|---|---|
| 45502 | Springfield, OH | 2.9 mi |
| 45506 | Springfield, OH | 3.4 mi |
| 45501 | Springfield, OH | 3.4 mi |
| 45319 | Donnelsville, OH | 4.7 mi |
| 45372 | Tremont City, OH | 4.8 mi |
| 45349 | North Hampton, OH | 4.9 mi |
| 45503 | Springfield, OH | 5.2 mi |
| 45505 | Springfield, OH | 6.1 mi |
| 45323 | Enon, OH | 7.5 mi |
| 45344 | New Carlisle, OH | 7.6 mi |
| 45341 | Medway, OH | 9.6 mi |
| 45387 | Yellow Springs, OH | 10.5 mi |
Questions about 45504
What is the ZIP+4 code for 45504?
45504 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 45504, you need to look up a specific street address to get them.
What city is 45504?
45504 is assigned to Springfield, Ohio, in Clark 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.