ZIP Code 66416 — Circleville, KS
66416 is a standard (street delivery) ZIP code serving Circleville, Kansas, in Jackson 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 66416 at a glance
| ZIP code | 66416 |
|---|---|
| Primary city | Circleville |
| State | Kansas (KS) |
| County | Jackson FIPS 20085 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 522 |
| Coordinates | 39.529440, -95.863530 |
How ZIP+4 works in 66416
The four digits after the hyphen encode a delivery segment inside 66416. 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 66416 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 66416.
| ZIP | City | Distance |
|---|---|---|
| 66540 | Soldier, KS | 6.6 mi |
| 66550 | Wetmore, KS | 9 mi |
| 66436 | Holton, KS | 9.6 mi |
| 66516 | Netawaka, KS | 10 mi |
| 66428 | Goff, KS | 10.7 mi |
| 66432 | Havensville, KS | 11.5 mi |
| 66417 | Corning, KS | 12.7 mi |
| 66552 | Whiting, KS | 13.5 mi |
| 66509 | Mayetta, KS | 14.3 mi |
| 66418 | Delia, KS | 17.1 mi |
| 66527 | Powhattan, KS | 17.9 mi |
| 66422 | Emmett, KS | 18 mi |
Questions about 66416
What is the ZIP+4 code for 66416?
66416 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 66416, you need to look up a specific street address to get them.
What city is 66416?
66416 is assigned to Circleville, Kansas, in Jackson 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.