ZIP Code 45121 — Georgetown, OH
45121 is a standard (street delivery) ZIP code serving Georgetown, Ohio, in Brown 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 45121 at a glance
| ZIP code | 45121 |
|---|---|
| Primary city | Georgetown |
| State | Ohio (OH) |
| County | Brown FIPS 39015 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 9,030 |
| Coordinates | 38.867690, -83.909110 |
How ZIP+4 works in 45121
The four digits after the hyphen encode a delivery segment inside 45121. 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 45121 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 45121.
| ZIP | City | Distance |
|---|---|---|
| 45119 | Feesburg, OH | 4.9 mi |
| 45130 | Hamersville, OH | 5.6 mi |
| 45131 | Higginsport, OH | 6.2 mi |
| 45168 | Russellville, OH | 7.7 mi |
| 45167 | Ripley, OH | 8.8 mi |
| 45106 | Bethel, OH | 10.1 mi |
| 45120 | Felicity, OH | 10.3 mi |
| 41002 | Augusta, KY | 10.3 mi |
| 41034 | Dover, KY | 11.5 mi |
| 45115 | Decatur, OH | 11.6 mi |
| 45171 | Sardinia, OH | 11.8 mi |
| 45154 | Mount Orab, OH | 13.4 mi |
Questions about 45121
What is the ZIP+4 code for 45121?
45121 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 45121, you need to look up a specific street address to get them.
What city is 45121?
45121 is assigned to Georgetown, Ohio, in Brown 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.