ZIP Code 49318 — Casnovia, MI
49318 is a standard (street delivery) ZIP code serving Casnovia, Michigan, in Muskegon 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 49318 at a glance
| ZIP code | 49318 |
|---|---|
| Primary city | Casnovia |
| State | Michigan (MI) |
| County | Muskegon FIPS 26121 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 1,604 |
| Coordinates | 43.223190, -85.829810 |
How ZIP+4 works in 49318
The four digits after the hyphen encode a delivery segment inside 49318. 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 49318 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 49318.
| ZIP | City | Distance |
|---|---|---|
| 49303 | Bailey, MI | 4 mi |
| 49330 | Kent City, MI | 4.9 mi |
| 49403 | Conklin, MI | 6.3 mi |
| 49451 | Ravenna, MI | 7.1 mi |
| 49327 | Grant, MI | 7.8 mi |
| 49345 | Sparta, MI | 8 mi |
| 49404 | Coopersville, MI | 12.4 mi |
| 49321 | Comstock Park, MI | 12.7 mi |
| 49544 | Grand Rapids, MI | 13 mi |
| 49435 | Marne, MI | 13.6 mi |
| 49430 | Lamont, MI | 15 mi |
| 49415 | Fruitport, MI | 15.2 mi |
Questions about 49318
What is the ZIP+4 code for 49318?
49318 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 49318, you need to look up a specific street address to get them.
What city is 49318?
49318 is assigned to Casnovia, Michigan, in Muskegon 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.