ZIP Code 61855 — Milmine, IL
61855 is a standard (street delivery) ZIP code serving Milmine, Illinois, in Piatt 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 61855 at a glance
| ZIP code | 61855 |
|---|---|
| Primary city | Milmine |
| State | Illinois (IL) |
| County | Piatt FIPS 17147 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 24 |
| Coordinates | 39.924380, -88.660560 |
How ZIP+4 works in 61855
The four digits after the hyphen encode a delivery segment inside 61855. 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 61855 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 61855.
| ZIP | City | Distance |
|---|---|---|
| 61818 | Cerro Gordo, IL | 4.1 mi |
| 61813 | Bement, IL | 5.5 mi |
| 61830 | Cisco, IL | 7 mi |
| 61929 | Hammond, IL | 7.3 mi |
| 62501 | Argenta, IL | 7.7 mi |
| 61856 | Monticello, IL | 8.3 mi |
| 61936 | La Place, IL | 9.1 mi |
| 62554 | Oreana, IL | 11.3 mi |
| 61913 | Atwood, IL | 12.1 mi |
| 61851 | Ivesdale, IL | 12.2 mi |
| 61937 | Lovington, IL | 12.8 mi |
| 61882 | Weldon, IL | 14 mi |
Questions about 61855
What is the ZIP+4 code for 61855?
61855 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 61855, you need to look up a specific street address to get them.
What city is 61855?
61855 is assigned to Milmine, Illinois, in Piatt 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.