ZIP Code 62664 — Mason City, IL
62664 is a standard (street delivery) ZIP code serving Mason City, Illinois, in Mason 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 62664 at a glance
| ZIP code | 62664 |
|---|---|
| Primary city | Mason City |
| State | Illinois (IL) |
| County | Mason FIPS 17125 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,922 |
| Coordinates | 40.211060, -89.726290 |
How ZIP+4 works in 62664
The four digits after the hyphen encode a delivery segment inside 62664. 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 62664 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 62664.
| ZIP | City | Distance |
|---|---|---|
| 62682 | San Jose, IL | 7.5 mi |
| 62633 | Easton, IL | 8 mi |
| 62642 | Greenview, IL | 8.4 mi |
| 62671 | New Holland, IL | 9.4 mi |
| 61532 | Forest City, IL | 10.4 mi |
| 62666 | Middletown, IL | 13 mi |
| 61567 | Topeka, IL | 13.3 mi |
| 62643 | Hartsburg, IL | 14.3 mi |
| 61534 | Green Valley, IL | 14.4 mi |
| 62655 | Kilbourne, IL | 14.5 mi |
| 62675 | Petersburg, IL | 14.9 mi |
| 62635 | Emden, IL | 14.9 mi |
Questions about 62664
What is the ZIP+4 code for 62664?
62664 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 62664, you need to look up a specific street address to get them.
What city is 62664?
62664 is assigned to Mason City, Illinois, in Mason 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.