ZIP Code 45050 — Monroe, OH
45050 is a standard (street delivery) ZIP code serving Monroe, Ohio, in Butler 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 45050 at a glance
| ZIP code | 45050 |
|---|---|
| Primary city | Monroe |
| State | Ohio (OH) |
| County | Butler FIPS 39017 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 12,248 |
| Coordinates | 39.444370, -84.365940 |
How ZIP+4 works in 45050
The four digits after the hyphen encode a delivery segment inside 45050. 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 45050 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 45050.
| ZIP | City | Distance |
|---|---|---|
| 45044 | Middletown, OH | 0.8 mi |
| 45067 | Trenton, OH | 6.8 mi |
| 45005 | Franklin, OH | 7.1 mi |
| 45040 | Mason, OH | 7.1 mi |
| 45011 | Hamilton, OH | 7.3 mi |
| 45069 | West Chester, OH | 7.4 mi |
| 45055 | Overpeck, OH | 7.8 mi |
| 45036 | Lebanon, OH | 7.9 mi |
| 45042 | Middletown, OH | 8.1 mi |
| 45034 | Kings Mills, OH | 8.7 mi |
| 45065 | South Lebanon, OH | 9.6 mi |
| 45062 | Seven Mile, OH | 10.4 mi |
Questions about 45050
What is the ZIP+4 code for 45050?
45050 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 45050, you need to look up a specific street address to get them.
What city is 45050?
45050 is assigned to Monroe, Ohio, in Butler 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.