ZIP Code 45766 — New Marshfield, OH
45766 is a standard (street delivery) ZIP code serving New Marshfield, Ohio, in Athens 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 45766 at a glance
| ZIP code | 45766 |
|---|---|
| Primary city | New Marshfield |
| State | Ohio (OH) |
| County | Athens FIPS 39009 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,298 |
| Coordinates | 39.319310, -82.262470 |
How ZIP+4 works in 45766
The four digits after the hyphen encode a delivery segment inside 45766. 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 45766 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 45766.
| ZIP | City | Distance |
|---|---|---|
| 45654 | New Plymouth, OH | 7 mi |
| 45698 | Zaleski, OH | 7.4 mi |
| 45780 | The Plains, OH | 7.8 mi |
| 45710 | Albany, OH | 8.6 mi |
| 45719 | Chauncey, OH | 9 mi |
| 45764 | Nelsonville, OH | 9.2 mi |
| 45701 | Athens, OH | 9.7 mi |
| 43158 | Union Furnace, OH | 10.3 mi |
| 45716 | Buchtel, OH | 10.8 mi |
| 43127 | Haydenville, OH | 11.2 mi |
| 45761 | Millfield, OH | 11.5 mi |
| 45651 | Mcarthur, OH | 11.8 mi |
Questions about 45766
What is the ZIP+4 code for 45766?
45766 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 45766, you need to look up a specific street address to get them.
What city is 45766?
45766 is assigned to New Marshfield, Ohio, in Athens 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.