ZIP Code 66548 — Waterville, KS
66548 is a standard (street delivery) ZIP code serving Waterville, Kansas, in Marshall 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 66548 at a glance
| ZIP code | 66548 |
|---|---|
| Primary city | Waterville |
| State | Kansas (KS) |
| County | Marshall FIPS 20117 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 975 |
| Coordinates | 39.675510, -96.761460 |
How ZIP+4 works in 66548
The four digits after the hyphen encode a delivery segment inside 66548. 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 66548 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 66548.
| ZIP | City | Distance |
|---|---|---|
| 66933 | Barnes, KS | 5.6 mi |
| 66411 | Blue Rapids, KS | 6.9 mi |
| 66943 | Greenleaf, KS | 11.2 mi |
| 66554 | Randolph, KS | 12.9 mi |
| 66508 | Marysville, KS | 14.1 mi |
| 66945 | Hanover, KS | 15.8 mi |
| 66412 | Bremen, KS | 16.1 mi |
| 66427 | Frankfort, KS | 16.6 mi |
| 67447 | Green, KS | 17.5 mi |
| 66438 | Home, KS | 17.6 mi |
| 66953 | Linn, KS | 19 mi |
| 66968 | Washington, KS | 19.3 mi |
Questions about 66548
What is the ZIP+4 code for 66548?
66548 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 66548, you need to look up a specific street address to get them.
What city is 66548?
66548 is assigned to Waterville, Kansas, in Marshall 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.