ZIP Code 49431 — Ludington, MI
49431 is a standard (street delivery) ZIP code serving Ludington, Michigan, in Mason 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 49431 at a glance
| ZIP code | 49431 |
|---|---|
| Primary city | Ludington |
| State | Michigan (MI) |
| County | Mason FIPS 26105 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 17,184 |
| Coordinates | 43.972510, -86.397920 |
How ZIP+4 works in 49431
The four digits after the hyphen encode a delivery segment inside 49431. 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 49431 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 49431.
| ZIP | City | Distance |
|---|---|---|
| 49454 | Scottville, MI | 5.7 mi |
| 49405 | Custer, MI | 11.2 mi |
| 49411 | Free Soil, MI | 11.9 mi |
| 49449 | Pentwater, MI | 12 mi |
| 49410 | Fountain, MI | 13.1 mi |
| 49458 | Walhalla, MI | 14.1 mi |
| 49634 | Filer City, MI | 17.6 mi |
| 49402 | Branch, MI | 18.2 mi |
| 49420 | Hart, MI | 18.4 mi |
| 49626 | Eastlake, MI | 19.4 mi |
| 49660 | Manistee, MI | 20.2 mi |
| 49436 | Mears, MI | 20.4 mi |
Questions about 49431
What is the ZIP+4 code for 49431?
49431 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 49431, you need to look up a specific street address to get them.
What city is 49431?
49431 is assigned to Ludington, Michigan, in Mason 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.