ZIP Code 43040 — Marysville, OH
43040 is a standard (street delivery) ZIP code serving Marysville, Ohio, in Union 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 43040 at a glance
| ZIP code | 43040 |
|---|---|
| Primary city | Marysville |
| State | Ohio (OH) |
| County | Union FIPS 39159 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 38,990 |
| Coordinates | 40.261150, -83.358120 |
How ZIP+4 works in 43040
The four digits after the hyphen encode a delivery segment inside 43040. 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 43040 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 43040.
| ZIP | City | Distance |
|---|---|---|
| 43007 | Broadway, OH | 5.5 mi |
| 43045 | Milford Center, OH | 8 mi |
| 43036 | Magnetic Springs, OH | 8 mi |
| 43061 | Ostrander, OH | 8.4 mi |
| 43077 | Unionville Center, OH | 8.6 mi |
| 43067 | Raymond, OH | 8.7 mi |
| 43336 | Middleburg, OH | 11.6 mi |
| 43060 | North Lewisburg, OH | 11.7 mi |
| 43344 | Richwood, OH | 11.8 mi |
| 43064 | Plain City, OH | 11.8 mi |
| 43319 | East Liberty, OH | 11.9 mi |
| 43084 | Woodstock, OH | 12 mi |
Questions about 43040
What is the ZIP+4 code for 43040?
43040 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 43040, you need to look up a specific street address to get them.
What city is 43040?
43040 is assigned to Marysville, Ohio, in Union 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.