ZIP Code 50548 — Humboldt, IA
50548 is a standard (street delivery) ZIP code serving Humboldt, Iowa, in Humboldt 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 50548 at a glance
| ZIP code | 50548 |
|---|---|
| Primary city | Humboldt |
| State | Iowa (IA) |
| County | Humboldt FIPS 19091 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 5,722 |
| Coordinates | 42.712750, -94.226450 |
How ZIP+4 works in 50548
The four digits after the hyphen encode a delivery segment inside 50548. 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 50548 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 50548.
| ZIP | City | Distance |
|---|---|---|
| 50529 | Dakota City, IA | 1.4 mi |
| 50582 | Rutland, IA | 6.8 mi |
| 50516 | Badger, IA | 7.6 mi |
| 50591 | Thor, IA | 9 mi |
| 50545 | Hardy, IA | 9.4 mi |
| 50524 | Clare, IA | 10.3 mi |
| 50520 | Bradgate, IA | 10.8 mi |
| 50558 | Livermore, IA | 11.1 mi |
| 50541 | Gilmore City, IA | 11.2 mi |
| 50594 | Vincent, IA | 12.9 mi |
| 50519 | Bode, IA | 13.3 mi |
| 50570 | Ottosen, IA | 14.3 mi |
Questions about 50548
What is the ZIP+4 code for 50548?
50548 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 50548, you need to look up a specific street address to get them.
What city is 50548?
50548 is assigned to Humboldt, Iowa, in Humboldt 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.