ZIP Code 49401 — Allendale, MI
49401 is a standard (street delivery) ZIP code serving Allendale, Michigan, in Ottawa 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 49401 at a glance
| ZIP code | 49401 |
|---|---|
| Primary city | Allendale |
| State | Michigan (MI) |
| County | Ottawa FIPS 26139 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 29,674 |
| Coordinates | 42.976300, -85.956040 |
How ZIP+4 works in 49401
The four digits after the hyphen encode a delivery segment inside 49401. 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 49401 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 49401.
| ZIP | City | Distance |
|---|---|---|
| 49430 | Lamont, MI | 3.7 mi |
| 49404 | Coopersville, MI | 6.2 mi |
| 49435 | Marne, MI | 6.8 mi |
| 49428 | Jenison, MI | 7.1 mi |
| 49426 | Hudsonville, MI | 8.3 mi |
| 49534 | Grand Rapids, MI | 8.5 mi |
| 49464 | Zeeland, MI | 9.4 mi |
| 49460 | West Olive, MI | 9.9 mi |
| 49448 | Nunica, MI | 9.9 mi |
| 49417 | Grand Haven, MI | 9.9 mi |
| 49418 | Grandville, MI | 11.5 mi |
| 49544 | Grand Rapids, MI | 11.8 mi |
Questions about 49401
What is the ZIP+4 code for 49401?
49401 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 49401, you need to look up a specific street address to get them.
What city is 49401?
49401 is assigned to Allendale, Michigan, in Ottawa 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.