ZIP Code 61442 — Keithsburg, IL
61442 is a standard (street delivery) ZIP code serving Keithsburg, Illinois, in Mercer 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 61442 at a glance
| ZIP code | 61442 |
|---|---|
| Primary city | Keithsburg |
| State | Illinois (IL) |
| County | Mercer FIPS 17131 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 504 |
| Coordinates | 41.102370, -90.923030 |
How ZIP+4 works in 61442
The four digits after the hyphen encode a delivery segment inside 61442. 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 61442 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 61442.
| ZIP | City | Distance |
|---|---|---|
| 52646 | Oakville, IA | 4.7 mi |
| 61476 | Seaton, IL | 4.8 mi |
| 61469 | Oquawka, IL | 9.7 mi |
| 61260 | Joy, IL | 9.8 mi |
| 61453 | Little York, IL | 10.3 mi |
| 61272 | New Boston, IL | 11 mi |
| 52637 | Mediapolis, IA | 12.5 mi |
| 61231 | Aledo, IL | 12.9 mi |
| 52653 | Wapello, IA | 12.9 mi |
| 52650 | Sperry, IA | 16.2 mi |
| 61237 | Buffalo Prairie, IL | 16.8 mi |
| 61412 | Alexis, IL | 17.5 mi |
Questions about 61442
What is the ZIP+4 code for 61442?
61442 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 61442, you need to look up a specific street address to get them.
What city is 61442?
61442 is assigned to Keithsburg, Illinois, in Mercer 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.