ZIP Code 66541 — Summerfield, KS
66541 is a standard (street delivery) ZIP code serving Summerfield, 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 66541 at a glance
| ZIP code | 66541 |
|---|---|
| Primary city | Summerfield |
| State | Kansas (KS) |
| County | Marshall FIPS 20117 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 234 |
| Coordinates | 39.978910, -96.347810 |
How ZIP+4 works in 66541
The four digits after the hyphen encode a delivery segment inside 66541. 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 66541 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 66541.
| ZIP | City | Distance |
|---|---|---|
| 66406 | Beattie, KS | 7.1 mi |
| 66403 | Axtell, KS | 7.1 mi |
| 68381 | Liberty, NE | 9.9 mi |
| 68323 | Burchard, NE | 10.6 mi |
| 66518 | Oketo, KS | 11 mi |
| 68420 | Pawnee City, NE | 11.1 mi |
| 66404 | Baileyville, KS | 11.8 mi |
| 68309 | Barneston, NE | 12.8 mi |
| 66438 | Home, KS | 12.9 mi |
| 68466 | Wymore, NE | 16.6 mi |
| 66508 | Marysville, KS | 17.7 mi |
| 68441 | Steinauer, NE | 17.7 mi |
Questions about 66541
What is the ZIP+4 code for 66541?
66541 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 66541, you need to look up a specific street address to get them.
What city is 66541?
66541 is assigned to Summerfield, 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.