ZIP Code 45621 — Coalton, OH
45621 is a standard (street delivery) ZIP code serving Coalton, Ohio, in Jackson 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 45621 at a glance
| ZIP code | 45621 |
|---|---|
| Primary city | Coalton |
| State | Ohio (OH) |
| County | Jackson FIPS 39079 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 509 |
| Coordinates | 39.111380, -82.609960 |
How ZIP+4 works in 45621
The four digits after the hyphen encode a delivery segment inside 45621. 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 45621 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 45621.
| ZIP | City | Distance |
|---|---|---|
| 45692 | Wellston, OH | 3.6 mi |
| 45640 | Jackson, OH | 6.4 mi |
| 45672 | Ray, OH | 7.4 mi |
| 45634 | Hamden, OH | 7.9 mi |
| 45673 | Richmond Dale, OH | 12.5 mi |
| 45651 | Mcarthur, OH | 13.4 mi |
| 45695 | Wilkesville, OH | 13.5 mi |
| 45613 | Beaver, OH | 13.9 mi |
| 45647 | Londonderry, OH | 14.5 mi |
| 45686 | Vinton, OH | 14.7 mi |
| 45685 | Thurman, OH | 14.9 mi |
| 45656 | Oak Hill, OH | 16.3 mi |
Questions about 45621
What is the ZIP+4 code for 45621?
45621 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 45621, you need to look up a specific street address to get them.
What city is 45621?
45621 is assigned to Coalton, Ohio, in Jackson 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.