ZIP Code 60551 — Sheridan, IL
60551 is a standard (street delivery) ZIP code serving Sheridan, Illinois, in LaSalle 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 60551 at a glance
| ZIP code | 60551 |
|---|---|
| Primary city | Sheridan |
| State | Illinois (IL) |
| County | LaSalle FIPS 17099 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 5,058 |
| Coordinates | 41.524630, -88.689920 |
How ZIP+4 works in 60551
The four digits after the hyphen encode a delivery segment inside 60551. 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 60551 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 60551.
| ZIP | City | Distance |
|---|---|---|
| 60549 | Serena, IL | 3.6 mi |
| 60537 | Millington, IL | 5.2 mi |
| 60557 | Wedron, IL | 6.8 mi |
| 60531 | Leland, IL | 8 mi |
| 60541 | Newark, IL | 8.5 mi |
| 60536 | Millbrook, IL | 8.8 mi |
| 60548 | Sandwich, IL | 9 mi |
| 60552 | Somonauk, IL | 9.5 mi |
| 61341 | Marseilles, IL | 12.7 mi |
| 60518 | Earlville, IL | 13.1 mi |
| 60545 | Plano, IL | 13.2 mi |
| 61360 | Seneca, IL | 13.8 mi |
Questions about 60551
What is the ZIP+4 code for 60551?
60551 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 60551, you need to look up a specific street address to get them.
What city is 60551?
60551 is assigned to Sheridan, Illinois, in LaSalle 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.