ZIP Code 49345 — Sparta, MI
49345 is a standard (street delivery) ZIP code serving Sparta, Michigan, in Kent 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 49345 at a glance
| ZIP code | 49345 |
|---|---|
| Primary city | Sparta |
| State | Michigan (MI) |
| County | Kent FIPS 26081 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Detroit |
| Population | 13,512 |
| Coordinates | 43.154190, -85.702240 |
How ZIP+4 works in 49345
The four digits after the hyphen encode a delivery segment inside 49345. 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 49345 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 49345.
| ZIP | City | Distance |
|---|---|---|
| 49321 | Comstock Park, MI | 5.6 mi |
| 49330 | Kent City, MI | 6.5 mi |
| 49403 | Conklin, MI | 7.6 mi |
| 49544 | Grand Rapids, MI | 7.7 mi |
| 49318 | Casnovia, MI | 8 mi |
| 49306 | Belmont, MI | 8.7 mi |
| 49319 | Cedar Springs, MI | 10.1 mi |
| 49525 | Grand Rapids, MI | 10.7 mi |
| 49341 | Rockford, MI | 10.8 mi |
| 49505 | Grand Rapids, MI | 11.2 mi |
| 49435 | Marne, MI | 11.2 mi |
| 49303 | Bailey, MI | 11.6 mi |
Questions about 49345
What is the ZIP+4 code for 49345?
49345 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 49345, you need to look up a specific street address to get them.
What city is 49345?
49345 is assigned to Sparta, Michigan, in Kent 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.