ZIP Code 61821 — Champaign, IL
61821 is a standard (street delivery) ZIP code serving Champaign, Illinois, in Champaign 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 61821 at a glance
| ZIP code | 61821 |
|---|---|
| Primary city | Champaign |
| State | Illinois (IL) |
| County | Champaign FIPS 17019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 28,611 |
| Coordinates | 40.110410, -88.276110 |
How ZIP+4 works in 61821
The four digits after the hyphen encode a delivery segment inside 61821. 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 61821 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.
Other ZIP codes in Champaign
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 61821.
| ZIP | City | Distance |
|---|---|---|
| 61820 | Champaign, IL | 1.7 mi |
| 61822 | Champaign, IL | 2.4 mi |
| 61801 | Urbana, IL | 3.4 mi |
| 61874 | Savoy, IL | 4.2 mi |
| 61815 | Bondville, IL | 4.8 mi |
| 61802 | Urbana, IL | 6.8 mi |
| 61875 | Seymour, IL | 7.7 mi |
| 61880 | Tolono, IL | 9.5 mi |
| 61853 | Mahomet, IL | 10.7 mi |
| 61884 | White Heath, IL | 11 mi |
| 61878 | Thomasboro, IL | 11.1 mi |
| 61864 | Philo, IL | 11.4 mi |
Questions about 61821
What is the ZIP+4 code for 61821?
61821 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 61821, you need to look up a specific street address to get them.
What city is 61821?
61821 is assigned to Champaign, Illinois, in Champaign 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.