ZIP Code 60966 — Sheldon, IL
60966 is a standard (street delivery) ZIP code serving Sheldon, Illinois, in Iroquois 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 60966 at a glance
| ZIP code | 60966 |
|---|---|
| Primary city | Sheldon |
| State | Illinois (IL) |
| County | Iroquois FIPS 17075 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,385 |
| Coordinates | 40.751440, -87.583210 |
How ZIP+4 works in 60966
The four digits after the hyphen encode a delivery segment inside 60966. 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 60966 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 60966.
| ZIP | City | Distance |
|---|---|---|
| 60945 | Iroquois, IL | 5.5 mi |
| 47951 | Kentland, IN | 7.8 mi |
| 60974 | Woodland, IL | 8.3 mi |
| 47942 | Earl Park, IN | 8.4 mi |
| 60970 | Watseka, IL | 8.7 mi |
| 60967 | Stockland, IL | 8.8 mi |
| 60931 | Donovan, IL | 9.7 mi |
| 60953 | Milford, IL | 10.1 mi |
| 60928 | Crescent City, IL | 14 mi |
| 60951 | Martinton, IL | 14.3 mi |
| 47922 | Brook, IN | 14.8 mi |
| 60912 | Beaverville, IL | 15.3 mi |
Questions about 60966
What is the ZIP+4 code for 60966?
60966 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 60966, you need to look up a specific street address to get them.
What city is 60966?
60966 is assigned to Sheldon, Illinois, in Iroquois 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.