ZIP Code 48820 — Dewitt, MI
48820 is a standard (street delivery) ZIP code serving Dewitt, Michigan, in Clinton 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 48820 at a glance
| ZIP code | 48820 |
|---|---|
| Primary city | Dewitt |
| State | Michigan (MI) |
| County | Clinton FIPS 26037 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 18,357 |
| Coordinates | 42.862770, -84.593740 |
How ZIP+4 works in 48820
The four digits after the hyphen encode a delivery segment inside 48820. 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 48820 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 48820.
| ZIP | City | Distance |
|---|---|---|
| 48906 | Lansing, MI | 5.4 mi |
| 48808 | Bath, MI | 7.7 mi |
| 48915 | Lansing, MI | 8.6 mi |
| 48822 | Eagle, MI | 8.7 mi |
| 48912 | Lansing, MI | 9.3 mi |
| 48933 | Lansing, MI | 9.4 mi |
| 48917 | Lansing, MI | 9.8 mi |
| 48823 | East Lansing, MI | 9.9 mi |
| 48879 | Saint Johns, MI | 9.9 mi |
| 48825 | East Lansing, MI | 10.9 mi |
| 48894 | Westphalia, MI | 11.1 mi |
| 48824 | East Lansing, MI | 11.4 mi |
Questions about 48820
What is the ZIP+4 code for 48820?
48820 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 48820, you need to look up a specific street address to get them.
What city is 48820?
48820 is assigned to Dewitt, Michigan, in Clinton 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.