ZIP Code 50272 — Williamson, IA
50272 is a standard (street delivery) ZIP code serving Williamson, Iowa, in Lucas 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 50272 at a glance
| ZIP code | 50272 |
|---|---|
| Primary city | Williamson |
| State | Iowa (IA) |
| County | Lucas FIPS 19117 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 190 |
| Coordinates | 41.088090, -93.256820 |
How ZIP+4 works in 50272
The four digits after the hyphen encode a delivery segment inside 50272. 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 50272 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 50272.
| ZIP | City | Distance |
|---|---|---|
| 50049 | Chariton, IA | 4 mi |
| 50057 | Columbia, IA | 8.5 mi |
| 50238 | Russell, IA | 9.1 mi |
| 50139 | Lacona, IA | 9.2 mi |
| 50163 | Melcher Dallas, IA | 9.3 mi |
| 50062 | Melcher Dallas, IA | 10.2 mi |
| 50151 | Lucas, IA | 12.5 mi |
| 52569 | Melrose, IA | 13.1 mi |
| 50145 | Liberty Center, IA | 14.3 mi |
| 50068 | Derby, IA | 14.9 mi |
| 50150 | Lovilia, IA | 15 mi |
| 50116 | Hamilton, IA | 15.6 mi |
Questions about 50272
What is the ZIP+4 code for 50272?
50272 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 50272, you need to look up a specific street address to get them.
What city is 50272?
50272 is assigned to Williamson, Iowa, in Lucas 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.