ZIP Code 55366 — New Auburn, MN
55366 is a standard (street delivery) ZIP code serving New Auburn, Minnesota, in Sibley 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 55366 at a glance
| ZIP code | 55366 |
|---|---|
| Primary city | New Auburn |
| State | Minnesota (MN) |
| County | Sibley FIPS 27143 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 423 |
| Coordinates | 44.672330, -94.234600 |
How ZIP+4 works in 55366
The four digits after the hyphen encode a delivery segment inside 55366. 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 55366 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 55366.
| ZIP | City | Distance |
|---|---|---|
| 55312 | Brownton, MN | 6 mi |
| 55336 | Glencoe, MN | 7.1 mi |
| 55307 | Arlington, MN | 8.1 mi |
| 55334 | Gaylord, MN | 9.5 mi |
| 55396 | Winthrop, MN | 11 mi |
| 55338 | Green Isle, MN | 11.7 mi |
| 55370 | Plato, MN | 12.2 mi |
| 55385 | Stewart, MN | 13.4 mi |
| 55339 | Hamburg, MN | 14.1 mi |
| 56044 | Henderson, MN | 16.5 mi |
| 55354 | Lester Prairie, MN | 16.7 mi |
| 55368 | Norwood Young America, MN | 17.3 mi |
Questions about 55366
What is the ZIP+4 code for 55366?
55366 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 55366, you need to look up a specific street address to get them.
What city is 55366?
55366 is assigned to New Auburn, Minnesota, in Sibley 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.