ZIP Code 61088 — Winnebago, IL
61088 is a standard (street delivery) ZIP code serving Winnebago, Illinois, in Winnebago 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 61088 at a glance
| ZIP code | 61088 |
|---|---|
| Primary city | Winnebago |
| State | Illinois (IL) |
| County | Winnebago FIPS 17201 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 6,167 |
| Coordinates | 42.269950, -89.255090 |
How ZIP+4 works in 61088
The four digits after the hyphen encode a delivery segment inside 61088. 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 61088 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 61088.
| ZIP | City | Distance |
|---|---|---|
| 61077 | Seward, IL | 5.2 mi |
| 61063 | Pecatonica, IL | 5.6 mi |
| 61102 | Rockford, IL | 5.7 mi |
| 61101 | Rockford, IL | 7.2 mi |
| 61104 | Rockford, IL | 9.1 mi |
| 61010 | Byron, IL | 9.3 mi |
| 61103 | Rockford, IL | 10.2 mi |
| 61047 | Leaf River, IL | 10.8 mi |
| 61084 | Stillman Valley, IL | 11 mi |
| 61067 | Ridott, IL | 11.5 mi |
| 61109 | Rockford, IL | 11.6 mi |
| 61024 | Durand, IL | 11.6 mi |
Questions about 61088
What is the ZIP+4 code for 61088?
61088 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 61088, you need to look up a specific street address to get them.
What city is 61088?
61088 is assigned to Winnebago, Illinois, in Winnebago 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?
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