ZIP Code 49203 — Jackson, MI
49203 is a standard (street delivery) ZIP code serving Jackson, Michigan, in Jackson 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 49203 at a glance
| ZIP code | 49203 |
|---|---|
| Primary city | Jackson |
| State | Michigan (MI) |
| County | Jackson FIPS 26075 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 36,474 |
| Coordinates | 42.220960, -84.403470 |
How ZIP+4 works in 49203
The four digits after the hyphen encode a delivery segment inside 49203. 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 49203 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 Jackson
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 49203.
| ZIP | City | Distance |
|---|---|---|
| 49201 | Jackson, MI | 2.4 mi |
| 49202 | Jackson, MI | 3.2 mi |
| 49254 | Michigan Center, MI | 4.2 mi |
| 49234 | Clarklake, MI | 7.1 mi |
| 49283 | Spring Arbor, MI | 7.8 mi |
| 49246 | Horton, MI | 8.5 mi |
| 49261 | Napoleon, MI | 9 mi |
| 49269 | Parma, MI | 10.6 mi |
| 49233 | Cement City, MI | 11 mi |
| 49277 | Rives Junction, MI | 12 mi |
| 49263 | Norvell, MI | 12.1 mi |
| 49240 | Grass Lake, MI | 12.1 mi |
Questions about 49203
What is the ZIP+4 code for 49203?
49203 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 49203, you need to look up a specific street address to get them.
What city is 49203?
49203 is assigned to Jackson, Michigan, in Jackson 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.