ZIP Code 53506 — Avoca, WI
53506 is a standard (street delivery) ZIP code serving Avoca, Wisconsin, in Iowa 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 53506 at a glance
| ZIP code | 53506 |
|---|---|
| Primary city | Avoca |
| State | Wisconsin (WI) |
| County | Iowa FIPS 55049 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,011 |
| Coordinates | 43.150170, -90.284220 |
How ZIP+4 works in 53506
The four digits after the hyphen encode a delivery segment inside 53506. 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 53506 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 53506.
| ZIP | City | Distance |
|---|---|---|
| 53540 | Gotham, WI | 5 mi |
| 53556 | Lone Rock, WI | 6.5 mi |
| 53543 | Highland, WI | 7.6 mi |
| 53584 | Sextonville, WI | 8.9 mi |
| 53573 | Muscoda, WI | 9.3 mi |
| 53588 | Spring Green, WI | 10.5 mi |
| 53526 | Cobb, WI | 12.5 mi |
| 53533 | Dodgeville, WI | 12.8 mi |
| 53569 | Montfort, WI | 13.8 mi |
| 53577 | Plain, WI | 15.6 mi |
| 53553 | Linden, WI | 16.4 mi |
| 53503 | Arena, WI | 16.5 mi |
Questions about 53506
What is the ZIP+4 code for 53506?
53506 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 53506, you need to look up a specific street address to get them.
What city is 53506?
53506 is assigned to Avoca, Wisconsin, in Iowa 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.