ZIP Code 43903 — Amsterdam, OH
43903 is a standard (street delivery) ZIP code serving Amsterdam, Ohio, in Carroll 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 43903 at a glance
| ZIP code | 43903 |
|---|---|
| Primary city | Amsterdam |
| State | Ohio (OH) |
| County | Carroll FIPS 39019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 2,116 |
| Coordinates | 40.470420, -80.951310 |
How ZIP+4 works in 43903
The four digits after the hyphen encode a delivery segment inside 43903. 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 43903 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 43903.
| ZIP | City | Distance |
|---|---|---|
| 43908 | Bergholz, OH | 4.9 mi |
| 43925 | East Springfield, OH | 5 mi |
| 43986 | Jewett, OH | 6.7 mi |
| 43976 | Hopedale, OH | 7.3 mi |
| 43988 | Scio, OH | 9 mi |
| 44615 | Carrollton, OH | 9.3 mi |
| 43910 | Bloomingdale, OH | 9.7 mi |
| 43944 | Richmond, OH | 9.9 mi |
| 44651 | Mechanicstown, OH | 10.5 mi |
| 43932 | Irondale, OH | 11.5 mi |
| 43930 | Hammondsville, OH | 11.6 mi |
| 44695 | Bowerston, OH | 12 mi |
Questions about 43903
What is the ZIP+4 code for 43903?
43903 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 43903, you need to look up a specific street address to get them.
What city is 43903?
43903 is assigned to Amsterdam, Ohio, in Carroll 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.