ZIP Code 62543 — Latham, IL
62543 is a standard (street delivery) ZIP code serving Latham, Illinois, in Logan 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 62543 at a glance
| ZIP code | 62543 |
|---|---|
| Primary city | Latham |
| State | Illinois (IL) |
| County | Logan FIPS 17107 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 477 |
| Coordinates | 39.970840, -89.151800 |
How ZIP+4 works in 62543
The four digits after the hyphen encode a delivery segment inside 62543. 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 62543 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 62543.
| ZIP | City | Distance |
|---|---|---|
| 62573 | Warrensburg, IL | 4.5 mi |
| 62518 | Chestnut, IL | 5.9 mi |
| 62548 | Mount Pulaski, IL | 6.8 mi |
| 62551 | Niantic, IL | 8.1 mi |
| 62537 | Harristown, IL | 8.7 mi |
| 61749 | Kenney, IL | 8.7 mi |
| 62539 | Illiopolis, IL | 8.8 mi |
| 62526 | Decatur, IL | 9.7 mi |
| 62535 | Forsyth, IL | 10.3 mi |
| 61756 | Maroa, IL | 10.8 mi |
| 62522 | Decatur, IL | 11.2 mi |
| 62541 | Lake Fork, IL | 11.6 mi |
Questions about 62543
What is the ZIP+4 code for 62543?
62543 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 62543, you need to look up a specific street address to get them.
What city is 62543?
62543 is assigned to Latham, Illinois, in Logan 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.