ZIP Code 53561 — Merrimac, WI
53561 is a standard (street delivery) ZIP code serving Merrimac, Wisconsin, in Sauk 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 53561 at a glance
| ZIP code | 53561 |
|---|---|
| Primary city | Merrimac |
| State | Wisconsin (WI) |
| County | Sauk FIPS 55111 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,872 |
| Coordinates | 43.395940, -89.644140 |
How ZIP+4 works in 53561
The four digits after the hyphen encode a delivery segment inside 53561. 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 53561 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 53561.
| ZIP | City | Distance |
|---|---|---|
| 53555 | Lodi, WI | 6.8 mi |
| 53913 | Baraboo, WI | 7.9 mi |
| 53578 | Prairie Du Sac, WI | 8.6 mi |
| 53951 | North Freedom, WI | 11.1 mi |
| 53955 | Poynette, WI | 12.2 mi |
| 53529 | Dane, WI | 12.3 mi |
| 53583 | Sauk City, WI | 12.8 mi |
| 53901 | Portage, WI | 13.6 mi |
| 53911 | Arlington, WI | 14.8 mi |
| 53560 | Mazomanie, WI | 15 mi |
| 53961 | Rock Springs, WI | 15.4 mi |
| 53940 | Lake Delton, WI | 15.4 mi |
Questions about 53561
What is the ZIP+4 code for 53561?
53561 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 53561, you need to look up a specific street address to get them.
What city is 53561?
53561 is assigned to Merrimac, Wisconsin, in Sauk 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.