ZIP Code 53091 — Theresa, WI
53091 is a standard (street delivery) ZIP code serving Theresa, Wisconsin, in Dodge 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 53091 at a glance
| ZIP code | 53091 |
|---|---|
| Primary city | Theresa |
| State | Wisconsin (WI) |
| County | Dodge FIPS 55027 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,123 |
| Coordinates | 43.496670, -88.436740 |
How ZIP+4 works in 53091
The four digits after the hyphen encode a delivery segment inside 53091. 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 53091 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 53091.
| ZIP | City | Distance |
|---|---|---|
| 53002 | Allenton, WI | 4.5 mi |
| 53050 | Mayville, WI | 5.6 mi |
| 53048 | Lomira, WI | 5.8 mi |
| 53035 | Iron Ridge, WI | 9 mi |
| 53099 | Woodland, WI | 9.2 mi |
| 53006 | Brownsville, WI | 9.9 mi |
| 53032 | Horicon, WI | 9.9 mi |
| 53010 | Campbellsport, WI | 11.2 mi |
| 53040 | Kewaskum, WI | 12.4 mi |
| 53078 | Rubicon, WI | 12.7 mi |
| 53027 | Hartford, WI | 12.8 mi |
| 53090 | West Bend, WI | 13.1 mi |
Questions about 53091
What is the ZIP+4 code for 53091?
53091 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 53091, you need to look up a specific street address to get them.
What city is 53091?
53091 is assigned to Theresa, Wisconsin, in Dodge 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.