ZIP Code 50577 — Renwick, IA
50577 is a standard (street delivery) ZIP code serving Renwick, 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 50577 at a glance
| ZIP code | 50577 |
|---|---|
| Primary city | Renwick |
| State | Iowa (IA) |
| County | Humboldt FIPS 19091 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 341 |
| Coordinates | 42.857740, -93.979020 |
How ZIP+4 works in 50577
The four digits after the hyphen encode a delivery segment inside 50577. 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 50577 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 50577.
| ZIP | City | Distance |
|---|---|---|
| 50542 | Goldfield, IA | 5.7 mi |
| 50545 | Hardy, IA | 6.7 mi |
| 50430 | Corwith, IA | 8.3 mi |
| 50560 | Lu Verne, IA | 9.3 mi |
| 50558 | Livermore, IA | 9.5 mi |
| 50447 | Kanawha, IA | 10.2 mi |
| 50591 | Thor, IA | 13.1 mi |
| 50525 | Clarion, IA | 14.2 mi |
| 50529 | Dakota City, IA | 14.6 mi |
| 50533 | Eagle Grove, IA | 14.6 mi |
| 50519 | Bode, IA | 14.8 mi |
| 50548 | Humboldt, IA | 16 mi |
Questions about 50577
What is the ZIP+4 code for 50577?
50577 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 50577, you need to look up a specific street address to get them.
What city is 50577?
50577 is assigned to Renwick, 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.