ZIP Code 45679 — Seaman, OH
45679 is a standard (street delivery) ZIP code serving Seaman, Ohio, in Adams 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 45679 at a glance
| ZIP code | 45679 |
|---|---|
| Primary city | Seaman |
| State | Ohio (OH) |
| County | Adams FIPS 39001 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 2,841 |
| Coordinates | 38.976340, -83.567880 |
How ZIP+4 works in 45679
The four digits after the hyphen encode a delivery segment inside 45679. 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 45679 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 45679.
| ZIP | City | Distance |
|---|---|---|
| 45697 | Winchester, OH | 5.9 mi |
| 45618 | Cherry Fork, OH | 6.8 mi |
| 45155 | Mowrystown, OH | 10.8 mi |
| 45660 | Peebles, OH | 11.3 mi |
| 45693 | West Union, OH | 11.7 mi |
| 45172 | Sinking Spring, OH | 11.8 mi |
| 45133 | Hillsboro, OH | 12.5 mi |
| 45171 | Sardinia, OH | 12.5 mi |
| 45168 | Russellville, OH | 13.7 mi |
| 45115 | Decatur, OH | 13.8 mi |
| 45646 | Latham, OH | 15.2 mi |
| 45105 | Bentonville, OH | 15.8 mi |
Questions about 45679
What is the ZIP+4 code for 45679?
45679 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 45679, you need to look up a specific street address to get them.
What city is 45679?
45679 is assigned to Seaman, Ohio, in Adams 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.