ZIP Code 43101 — Adelphi, OH
43101 is a standard (street delivery) ZIP code serving Adelphi, Ohio, in Ross 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 43101 at a glance
| ZIP code | 43101 |
|---|---|
| Primary city | Adelphi |
| State | Ohio (OH) |
| County | Ross FIPS 39141 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 316 |
| Coordinates | 39.464660, -82.745630 |
How ZIP+4 works in 43101
The four digits after the hyphen encode a delivery segment inside 43101. 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 43101 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 43101.
| ZIP | City | Distance |
|---|---|---|
| 43135 | Laurelville, OH | 2.6 mi |
| 45644 | Kingston, OH | 5.2 mi |
| 43156 | Tarlton, OH | 6.4 mi |
| 43152 | South Bloomingville, OH | 8.6 mi |
| 43154 | Stoutsville, OH | 10.5 mi |
| 43149 | Rockbridge, OH | 10.5 mi |
| 45647 | Londonderry, OH | 11.6 mi |
| 43102 | Amanda, OH | 12.2 mi |
| 43113 | Circleville, OH | 14.5 mi |
| 45622 | Creola, OH | 15.2 mi |
| 45601 | Chillicothe, OH | 15.5 mi |
| 43155 | Sugar Grove, OH | 16.1 mi |
Questions about 43101
What is the ZIP+4 code for 43101?
43101 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 43101, you need to look up a specific street address to get them.
What city is 43101?
43101 is assigned to Adelphi, Ohio, in Ross 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.