ZIP Code 61345 — Neponset, IL
61345 is a standard (street delivery) ZIP code serving Neponset, Illinois, in Bureau 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 61345 at a glance
| ZIP code | 61345 |
|---|---|
| Primary city | Neponset |
| State | Illinois (IL) |
| County | Bureau FIPS 17011 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 770 |
| Coordinates | 41.279810, -89.788780 |
How ZIP+4 works in 61345
The four digits after the hyphen encode a delivery segment inside 61345. 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 61345 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 61345.
| ZIP | City | Distance |
|---|---|---|
| 61314 | Buda, IL | 6 mi |
| 61443 | Kewanee, IL | 8.1 mi |
| 61361 | Sheffield, IL | 9 mi |
| 61344 | Mineral, IL | 9.5 mi |
| 61421 | Bradford, IL | 10 mi |
| 61379 | Wyanet, IL | 11.6 mi |
| 61234 | Annawan, IL | 11.7 mi |
| 61426 | Castleton, IL | 11.9 mi |
| 61368 | Tiskilwa, IL | 14 mi |
| 61483 | Toulon, IL | 14.3 mi |
| 61338 | Manlius, IL | 14.6 mi |
| 61235 | Atkinson, IL | 14.7 mi |
Questions about 61345
What is the ZIP+4 code for 61345?
61345 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 61345, you need to look up a specific street address to get them.
What city is 61345?
61345 is assigned to Neponset, Illinois, in Bureau 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.