ZIP Code 62420 — Casey, IL
62420 is a standard (street delivery) ZIP code serving Casey, Illinois, in Clark 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 62420 at a glance
| ZIP code | 62420 |
|---|---|
| Primary city | Casey |
| State | Illinois (IL) |
| County | Clark FIPS 17023 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 4,299 |
| Coordinates | 39.290650, -88.000500 |
How ZIP+4 works in 62420
The four digits after the hyphen encode a delivery segment inside 62420. 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 62420 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 62420.
| ZIP | City | Distance |
|---|---|---|
| 62428 | Greenup, IL | 7.2 mi |
| 62442 | Martinsville, IL | 7.9 mi |
| 62474 | Westfield, IL | 10 mi |
| 62481 | Yale, IL | 11.4 mi |
| 62432 | Hidalgo, IL | 13.2 mi |
| 62413 | Annapolis, IL | 13.4 mi |
| 62468 | Toledo, IL | 14.5 mi |
| 62436 | Jewett, IL | 15.6 mi |
| 62440 | Lerna, IL | 15.7 mi |
| 62478 | West York, IL | 15.7 mi |
| 61912 | Ashmore, IL | 16.5 mi |
| 61920 | Charleston, IL | 17.1 mi |
Questions about 62420
What is the ZIP+4 code for 62420?
62420 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 62420, you need to look up a specific street address to get them.
What city is 62420?
62420 is assigned to Casey, Illinois, in Clark 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.