ZIP Code 60552 — Somonauk, IL
60552 is a standard (street delivery) ZIP code serving Somonauk, 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 60552 at a glance
| ZIP code | 60552 |
|---|---|
| Primary city | Somonauk |
| State | Illinois (IL) |
| County | DeKalb FIPS 17037 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 4,285 |
| Coordinates | 41.661440, -88.703430 |
How ZIP+4 works in 60552
The four digits after the hyphen encode a delivery segment inside 60552. 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 60552 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 60552.
| ZIP | City | Distance |
|---|---|---|
| 60548 | Sandwich, IL | 3.7 mi |
| 60531 | Leland, IL | 5.3 mi |
| 60556 | Waterman, IL | 8 mi |
| 60537 | Millington, IL | 8.6 mi |
| 60545 | Plano, IL | 8.7 mi |
| 60520 | Hinckley, IL | 8.7 mi |
| 60536 | Millbrook, IL | 8.9 mi |
| 60551 | Sheridan, IL | 9.5 mi |
| 60511 | Big Rock, IL | 10.1 mi |
| 60549 | Serena, IL | 11.9 mi |
| 60518 | Earlville, IL | 12 mi |
| 60550 | Shabbona, IL | 12 mi |
Questions about 60552
What is the ZIP+4 code for 60552?
60552 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 60552, you need to look up a specific street address to get them.
What city is 60552?
60552 is assigned to Somonauk, 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.