ZIP Code 49045 — Decatur, MI
49045 is a standard (street delivery) ZIP code serving Decatur, Michigan, in Van Buren 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 49045 at a glance
| ZIP code | 49045 |
|---|---|
| Primary city | Decatur |
| State | Michigan (MI) |
| County | Van Buren FIPS 26159 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 5,321 |
| Coordinates | 42.103800, -86.002190 |
How ZIP+4 works in 49045
The four digits after the hyphen encode a delivery segment inside 49045. 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 49045 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 49045.
| ZIP | City | Distance |
|---|---|---|
| 49064 | Lawrence, MI | 8.4 mi |
| 49065 | Lawton, MI | 8.6 mi |
| 49047 | Dowagiac, MI | 9.2 mi |
| 49057 | Hartford, MI | 10.2 mi |
| 49079 | Paw Paw, MI | 10.5 mi |
| 49067 | Marcellus, MI | 11.7 mi |
| 49098 | Watervliet, MI | 13.1 mi |
| 49071 | Mattawan, MI | 14.2 mi |
| 49031 | Cassopolis, MI | 14.2 mi |
| 49095 | Vandalia, MI | 14.7 mi |
| 49013 | Bangor, MI | 14.9 mi |
| 49111 | Eau Claire, MI | 15.5 mi |
Questions about 49045
What is the ZIP+4 code for 49045?
49045 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 49045, you need to look up a specific street address to get them.
What city is 49045?
49045 is assigned to Decatur, Michigan, in Van Buren 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.