ZIP Code 61811 — Alvin, IL
61811 is a standard (street delivery) ZIP code serving Alvin, Illinois, in Vermilion 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 61811 at a glance
| ZIP code | 61811 |
|---|---|
| Primary city | Alvin |
| State | Illinois (IL) |
| County | Vermilion FIPS 17183 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 578 |
| Coordinates | 40.295310, -87.621620 |
How ZIP+4 works in 61811
The four digits after the hyphen encode a delivery segment inside 61811. 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 61811 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 61811.
| ZIP | City | Distance |
|---|---|---|
| 61848 | Henning, IL | 4.3 mi |
| 61814 | Bismarck, IL | 5.1 mi |
| 60963 | Rossville, IL | 5.3 mi |
| 47982 | State Line, IN | 8.4 mi |
| 61834 | Danville, IL | 9.1 mi |
| 47991 | West Lebanon, IN | 9.2 mi |
| 61865 | Potomac, IL | 9.4 mi |
| 61831 | Collison, IL | 10.4 mi |
| 47993 | Williamsport, IN | 10.9 mi |
| 61832 | Danville, IL | 11.3 mi |
| 60942 | Hoopeston, IL | 12 mi |
| 61858 | Oakwood, IL | 13.6 mi |
Questions about 61811
What is the ZIP+4 code for 61811?
61811 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 61811, you need to look up a specific street address to get them.
What city is 61811?
61811 is assigned to Alvin, Illinois, in Vermilion 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.