ZIP Code 50057 — Columbia, IA
50057 is a standard (street delivery) ZIP code serving Columbia, Iowa, in Marion 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 50057 at a glance
| ZIP code | 50057 |
|---|---|
| Primary city | Columbia |
| State | Iowa (IA) |
| County | Marion FIPS 19125 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 327 |
| Coordinates | 41.178590, -93.145540 |
How ZIP+4 works in 50057
The four digits after the hyphen encode a delivery segment inside 50057. 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 50057 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 50057.
| ZIP | City | Distance |
|---|---|---|
| 50163 | Melcher Dallas, IA | 5.8 mi |
| 50062 | Melcher Dallas, IA | 6.4 mi |
| 50116 | Hamilton, IA | 8.5 mi |
| 50272 | Williamson, IA | 8.5 mi |
| 50138 | Knoxville, IA | 8.8 mi |
| 50150 | Lovilia, IA | 9.6 mi |
| 50139 | Lacona, IA | 11.5 mi |
| 50049 | Chariton, IA | 12.5 mi |
| 50044 | Bussey, IA | 13.4 mi |
| 50256 | Tracy, IA | 13.6 mi |
| 50119 | Harvey, IA | 13.8 mi |
| 50238 | Russell, IA | 14.4 mi |
Questions about 50057
What is the ZIP+4 code for 50057?
50057 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 50057, you need to look up a specific street address to get them.
What city is 50057?
50057 is assigned to Columbia, Iowa, in Marion 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.