ZIP Code 50123 — Humeston, IA
50123 is a standard (street delivery) ZIP code serving Humeston, Iowa, in Wayne 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 50123 at a glance
| ZIP code | 50123 |
|---|---|
| Primary city | Humeston |
| State | Iowa (IA) |
| County | Wayne FIPS 19185 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 883 |
| Coordinates | 40.839380, -93.506340 |
How ZIP+4 works in 50123
The four digits after the hyphen encode a delivery segment inside 50123. 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 50123 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 50123.
| ZIP | City | Distance |
|---|---|---|
| 50103 | Garden Grove, IA | 6.3 mi |
| 50068 | Derby, IA | 7.4 mi |
| 50165 | Millerton, IA | 10.3 mi |
| 50264 | Weldon, IA | 11 mi |
| 50060 | Corydon, IA | 11.4 mi |
| 50008 | Allerton, IA | 12.8 mi |
| 50052 | Clio, IA | 13.8 mi |
| 50144 | Leon, IA | 14.1 mi |
| 50275 | Woodburn, IA | 14.7 mi |
| 50147 | Lineville, IA | 15 mi |
| 50262 | Van Wert, IA | 16.5 mi |
| 50151 | Lucas, IA | 16.7 mi |
Questions about 50123
What is the ZIP+4 code for 50123?
50123 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 50123, you need to look up a specific street address to get them.
What city is 50123?
50123 is assigned to Humeston, Iowa, in Wayne 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.