ZIP Code 43029 — Irwin, OH
43029 is a standard (street delivery) ZIP code serving Irwin, Ohio, in Madison 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 43029 at a glance
| ZIP code | 43029 |
|---|---|
| Primary city | Irwin |
| State | Ohio (OH) |
| County | Madison FIPS 39097 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 544 |
| Coordinates | 40.095980, -83.454080 |
How ZIP+4 works in 43029
The four digits after the hyphen encode a delivery segment inside 43029. 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 43029 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 43029.
| ZIP | City | Distance |
|---|---|---|
| 43045 | Milford Center, OH | 5.1 mi |
| 43084 | Woodstock, OH | 6.3 mi |
| 43044 | Mechanicsburg, OH | 6.6 mi |
| 43077 | Unionville Center, OH | 6.6 mi |
| 43064 | Plain City, OH | 8.7 mi |
| 43060 | North Lewisburg, OH | 10.6 mi |
| 43010 | Catawba, OH | 11.1 mi |
| 43009 | Cable, OH | 11.2 mi |
| 43047 | Mingo, OH | 12.4 mi |
| 43040 | Marysville, OH | 12.5 mi |
| 45369 | South Vienna, OH | 12.6 mi |
| 43162 | West Jefferson, OH | 13.1 mi |
Questions about 43029
What is the ZIP+4 code for 43029?
43029 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 43029, you need to look up a specific street address to get them.
What city is 43029?
43029 is assigned to Irwin, Ohio, in Madison 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.