ZIP Code 60112 — Cortland, IL
60112 is a standard (street delivery) ZIP code serving Cortland, Illinois, in DeKalb 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 60112 at a glance
| ZIP code | 60112 |
|---|---|
| Primary city | Cortland |
| State | Illinois (IL) |
| County | DeKalb FIPS 17037 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 4,621 |
| Coordinates | 41.923910, -88.689940 |
How ZIP+4 works in 60112
The four digits after the hyphen encode a delivery segment inside 60112. 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 60112 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 60112.
| ZIP | City | Distance |
|---|---|---|
| 60115 | Dekalb, IL | 3.7 mi |
| 60178 | Sycamore, IL | 5.8 mi |
| 60151 | Maple Park, IL | 6.4 mi |
| 60111 | Clare, IL | 9.3 mi |
| 60520 | Hinckley, IL | 9.9 mi |
| 60150 | Malta, IL | 10.3 mi |
| 60109 | Burlington, IL | 10.6 mi |
| 60144 | Kaneville, IL | 10.7 mi |
| 60119 | Elburn, IL | 11.7 mi |
| 60556 | Waterman, IL | 11.8 mi |
| 60145 | Kingston, IL | 12.6 mi |
| 60135 | Genoa, IL | 13 mi |
Questions about 60112
What is the ZIP+4 code for 60112?
60112 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 60112, you need to look up a specific street address to get them.
What city is 60112?
60112 is assigned to Cortland, Illinois, in DeKalb 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.