ZIP Code 52361 — Williamsburg, IA
52361 is a standard (street delivery) ZIP code serving Williamsburg, Iowa, 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 52361 at a glance
| ZIP code | 52361 |
|---|---|
| Primary city | Williamsburg |
| State | Iowa (IA) |
| County | Iowa FIPS 19095 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 4,582 |
| Coordinates | 41.644600, -92.015400 |
How ZIP+4 works in 52361
The four digits after the hyphen encode a delivery segment inside 52361. 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 52361 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 52361.
| ZIP | City | Distance |
|---|---|---|
| 52220 | Conroy, IA | 5.7 mi |
| 52325 | Parnell, IA | 6.5 mi |
| 52334 | South Amana, IA | 7 mi |
| 52316 | North English, IA | 8.4 mi |
| 52308 | Millersburg, IA | 8.9 mi |
| 52236 | Homestead, IA | 9.3 mi |
| 52301 | Marengo, IA | 10.5 mi |
| 52251 | Ladora, IA | 10.7 mi |
| 52307 | Middle Amana, IA | 11.7 mi |
| 52335 | South English, IA | 13 mi |
| 52203 | Amana, IA | 13.1 mi |
| 52322 | Oxford, IA | 13.4 mi |
Questions about 52361
What is the ZIP+4 code for 52361?
52361 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 52361, you need to look up a specific street address to get them.
What city is 52361?
52361 is assigned to Williamsburg, Iowa, 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.