ZIP Code 66748 — Humboldt, KS
66748 is a standard (street delivery) ZIP code serving Humboldt, Kansas, in Allen 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 66748 at a glance
| ZIP code | 66748 |
|---|---|
| Primary city | Humboldt |
| State | Kansas (KS) |
| County | Allen FIPS 20001 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,830 |
| Coordinates | 37.798820, -95.435770 |
How ZIP+4 works in 66748
The four digits after the hyphen encode a delivery segment inside 66748. 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 66748 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 66748.
| ZIP | City | Distance |
|---|---|---|
| 66749 | Iola, KS | 9.6 mi |
| 66742 | Gas, KS | 9.7 mi |
| 66720 | Chanute, KS | 10.6 mi |
| 66761 | Piqua, KS | 10.7 mi |
| 66751 | La Harpe, KS | 12.5 mi |
| 66732 | Elsmore, KS | 13.1 mi |
| 66772 | Savonburg, KS | 14 mi |
| 66717 | Buffalo, KS | 15.4 mi |
| 66755 | Moran, KS | 16.6 mi |
| 66775 | Stark, KS | 17.1 mi |
| 66783 | Yates Center, KS | 17.1 mi |
| 66733 | Erie, KS | 17.5 mi |
Questions about 66748
What is the ZIP+4 code for 66748?
66748 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 66748, you need to look up a specific street address to get them.
What city is 66748?
66748 is assigned to Humboldt, Kansas, in Allen 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.