ZIP Code 49423 — Holland, MI
49423 is a standard (street delivery) ZIP code serving Holland, Michigan, in Allegan 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 49423 at a glance
| ZIP code | 49423 |
|---|---|
| Primary city | Holland |
| State | Michigan (MI) |
| County | Allegan FIPS 26005 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 47,060 |
| Coordinates | 42.739640, -86.090150 |
How ZIP+4 works in 49423
The four digits after the hyphen encode a delivery segment inside 49423. 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 49423 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.
Other ZIP codes in Holland
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 49423.
| ZIP | City | Distance |
|---|---|---|
| 49434 | Macatawa, MI | 6.3 mi |
| 49453 | Saugatuck, MI | 6.7 mi |
| 49419 | Hamilton, MI | 7.1 mi |
| 49424 | Holland, MI | 7.3 mi |
| 49464 | Zeeland, MI | 8.9 mi |
| 49406 | Douglas, MI | 9 mi |
| 49408 | Fennville, MI | 11.7 mi |
| 49426 | Hudsonville, MI | 13.4 mi |
| 49460 | West Olive, MI | 13.7 mi |
| 49323 | Dorr, MI | 15.4 mi |
| 49401 | Allendale, MI | 17.7 mi |
| 49450 | Pullman, MI | 17.7 mi |
Questions about 49423
What is the ZIP+4 code for 49423?
49423 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 49423, you need to look up a specific street address to get them.
What city is 49423?
49423 is assigned to Holland, Michigan, in Allegan 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.