ZIP Code 50104 — Gibson, IA
50104 is a standard (street delivery) ZIP code serving Gibson, Iowa, in Keokuk 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 50104 at a glance
| ZIP code | 50104 |
|---|---|
| Primary city | Gibson |
| State | Iowa (IA) |
| County | Keokuk FIPS 19107 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 103 |
| Coordinates | 41.494580, -92.388410 |
How ZIP+4 works in 50104
The four digits after the hyphen encode a delivery segment inside 50104. 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 50104 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 50104.
| ZIP | City | Distance |
|---|---|---|
| 50255 | Thornburg, IA | 3.9 mi |
| 50027 | Barnes City, IA | 4.5 mi |
| 50136 | Keswick, IA | 5.4 mi |
| 52222 | Deep River, IA | 6.2 mi |
| 50268 | What Cheer, IA | 6.2 mi |
| 50171 | Montezuma, IA | 9.4 mi |
| 52221 | Guernsey, IA | 10.5 mi |
| 52355 | Webster, IA | 10.9 mi |
| 52586 | Rose Hill, IA | 11 mi |
| 52550 | Delta, IA | 12.4 mi |
| 52308 | Millersburg, IA | 13 mi |
| 50207 | New Sharon, IA | 13.6 mi |
Questions about 50104
What is the ZIP+4 code for 50104?
50104 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 50104, you need to look up a specific street address to get them.
What city is 50104?
50104 is assigned to Gibson, Iowa, in Keokuk 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.