ZIP Code 45304 — Arcanum, OH
45304 is a standard (street delivery) ZIP code serving Arcanum, Ohio, in Darke 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 45304 at a glance
| ZIP code | 45304 |
|---|---|
| Primary city | Arcanum |
| State | Ohio (OH) |
| County | Darke FIPS 39037 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 7,599 |
| Coordinates | 39.987560, -84.531450 |
How ZIP+4 works in 45304
The four digits after the hyphen encode a delivery segment inside 45304. 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 45304 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 45304.
| ZIP | City | Distance |
|---|---|---|
| 45358 | Pitsburg, OH | 2.3 mi |
| 45337 | Laura, OH | 5.9 mi |
| 45378 | Verona, OH | 6.3 mi |
| 45361 | Potsdam, OH | 6.4 mi |
| 45382 | West Manchester, OH | 7.7 mi |
| 45354 | Phillipsburg, OH | 8.8 mi |
| 45328 | Gettysburg, OH | 9.1 mi |
| 45346 | New Madison, OH | 9.4 mi |
| 45338 | Lewisburg, OH | 9.4 mi |
| 45331 | Greenville, OH | 9.7 mi |
| 45339 | Ludlow Falls, OH | 10.1 mi |
| 45308 | Bradford, OH | 10.3 mi |
Questions about 45304
What is the ZIP+4 code for 45304?
45304 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 45304, you need to look up a specific street address to get them.
What city is 45304?
45304 is assigned to Arcanum, Ohio, in Darke 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.