ZIP Code 43570 — West Unity, OH
43570 is a standard (street delivery) ZIP code serving West Unity, Ohio, in Williams 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 43570 at a glance
| ZIP code | 43570 |
|---|---|
| Primary city | West Unity |
| State | Ohio (OH) |
| County | Williams FIPS 39171 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 2,867 |
| Coordinates | 41.586160, -84.441160 |
How ZIP+4 works in 43570
The four digits after the hyphen encode a delivery segment inside 43570. 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 43570 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 43570.
| ZIP | City | Distance |
|---|---|---|
| 43531 | Kunkle, OH | 4.4 mi |
| 43501 | Alvordton, OH | 5.9 mi |
| 43557 | Stryker, OH | 7.4 mi |
| 43554 | Pioneer, OH | 8.1 mi |
| 43502 | Archbold, OH | 8.1 mi |
| 43521 | Fayette, OH | 9.2 mi |
| 43543 | Montpelier, OH | 10 mi |
| 43506 | Bryan, OH | 10.1 mi |
| 49288 | Waldron, MI | 10.3 mi |
| 43519 | Evansport, OH | 11.5 mi |
| 43553 | Pettisville, OH | 11.8 mi |
| 43555 | Ridgeville Corners, OH | 14 mi |
Questions about 43570
What is the ZIP+4 code for 43570?
43570 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 43570, you need to look up a specific street address to get them.
What city is 43570?
43570 is assigned to West Unity, Ohio, in Williams 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.