ZIP Code 55904 — Rochester, MN
55904 is a standard (street delivery) ZIP code serving Rochester, Minnesota, in Olmsted 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 55904 at a glance
| ZIP code | 55904 |
|---|---|
| Primary city | Rochester |
| State | Minnesota (MN) |
| County | Olmsted FIPS 27109 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 29,639 |
| Coordinates | 43.962040, -92.399310 |
How ZIP+4 works in 55904
The four digits after the hyphen encode a delivery segment inside 55904. 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 55904 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.
Other ZIP codes in Rochester
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 55904.
| ZIP | City | Distance |
|---|---|---|
| 55903 | Rochester, MN | 4.7 mi |
| 55902 | Rochester, MN | 5.8 mi |
| 55934 | Eyota, MN | 7.2 mi |
| 55976 | Stewartville, MN | 8 mi |
| 55905 | Rochester, MN | 9 mi |
| 55901 | Rochester, MN | 9.4 mi |
| 55906 | Rochester, MN | 10 mi |
| 55920 | Byron, MN | 11.6 mi |
| 55929 | Dover, MN | 12.7 mi |
| 55967 | Racine, MN | 12.9 mi |
| 55932 | Elgin, MN | 13.1 mi |
| 55923 | Chatfield, MN | 13.3 mi |
Questions about 55904
What is the ZIP+4 code for 55904?
55904 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 55904, you need to look up a specific street address to get them.
What city is 55904?
55904 is assigned to Rochester, Minnesota, in Olmsted 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.