ZIP Code 50620 — Colwell, IA
50620 is a standard (street delivery) ZIP code serving Colwell, Iowa, in Floyd 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 50620 at a glance
| ZIP code | 50620 |
|---|---|
| Primary city | Colwell |
| State | Iowa (IA) |
| County | Floyd FIPS 19067 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 36 |
| Coordinates | 43.157120, -92.591200 |
How ZIP+4 works in 50620
The four digits after the hyphen encode a delivery segment inside 50620. 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 50620 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 50620.
| ZIP | City | Distance |
|---|---|---|
| 50616 | Charles City, IA | 6.4 mi |
| 50460 | Orchard, IA | 6.9 mi |
| 50603 | Alta Vista, IA | 7 mi |
| 50435 | Floyd, IA | 8.9 mi |
| 50645 | Ionia, IA | 11.8 mi |
| 50628 | Elma, IA | 12.6 mi |
| 50659 | New Hampton, IA | 14.4 mi |
| 50471 | Rudd, IA | 14.5 mi |
| 50658 | Nashua, IA | 14.5 mi |
| 50461 | Osage, IA | 14.9 mi |
| 50466 | Riceville, IA | 16.1 mi |
| 50454 | Little Cedar, IA | 17.4 mi |
Questions about 50620
What is the ZIP+4 code for 50620?
50620 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 50620, you need to look up a specific street address to get them.
What city is 50620?
50620 is assigned to Colwell, Iowa, in Floyd 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.