ZIP Code 48811 — Carson City, MI
48811 is a standard (street delivery) ZIP code serving Carson City, Michigan, in Montcalm 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 48811 at a glance
| ZIP code | 48811 |
|---|---|
| Primary city | Carson City |
| State | Michigan (MI) |
| County | Montcalm FIPS 26117 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 7,440 |
| Coordinates | 43.182260, -84.855180 |
How ZIP+4 works in 48811
The four digits after the hyphen encode a delivery segment inside 48811. 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 48811 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 48811.
| ZIP | City | Distance |
|---|---|---|
| 48845 | Hubbardston, MI | 5.2 mi |
| 48856 | Middleton, MI | 6.1 mi |
| 48818 | Crystal, MI | 6.8 mi |
| 48889 | Sumner, MI | 8.1 mi |
| 48870 | Palo, MI | 8.2 mi |
| 48871 | Perrinton, MI | 9.1 mi |
| 48860 | Muir, MI | 9.5 mi |
| 48834 | Fenwick, MI | 9.6 mi |
| 48884 | Sheridan, MI | 9.6 mi |
| 48853 | Maple Rapids, MI | 9.9 mi |
| 48835 | Fowler, MI | 11.8 mi |
| 48873 | Pewamo, MI | 11.9 mi |
Questions about 48811
What is the ZIP+4 code for 48811?
48811 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 48811, you need to look up a specific street address to get them.
What city is 48811?
48811 is assigned to Carson City, Michigan, in Montcalm 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.