ZIP Code 55990 — Wykoff, MN
55990 is a standard (street delivery) ZIP code serving Wykoff, Minnesota, in Fillmore 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 55990 at a glance
| ZIP code | 55990 |
|---|---|
| Primary city | Wykoff |
| State | Minnesota (MN) |
| County | Fillmore FIPS 27045 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 899 |
| Coordinates | 43.728500, -92.259100 |
How ZIP+4 works in 55990
The four digits after the hyphen encode a delivery segment inside 55990. 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 55990 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 55990.
| ZIP | City | Distance |
|---|---|---|
| 55935 | Fountain, MN | 6.7 mi |
| 55975 | Spring Valley, MN | 6.7 mi |
| 55923 | Chatfield, MN | 9.2 mi |
| 55965 | Preston, MN | 9.3 mi |
| 55967 | Racine, MN | 13.5 mi |
| 55961 | Ostrander, MN | 13.7 mi |
| 55976 | Stewartville, MN | 14.6 mi |
| 55939 | Harmony, MN | 15.3 mi |
| 55949 | Lanesboro, MN | 15.9 mi |
| 55936 | Grand Meadow, MN | 16.3 mi |
| 55951 | Le Roy, MN | 17.4 mi |
| 55904 | Rochester, MN | 17.6 mi |
Questions about 55990
What is the ZIP+4 code for 55990?
55990 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 55990, you need to look up a specific street address to get them.
What city is 55990?
55990 is assigned to Wykoff, Minnesota, in Fillmore 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.