ZIP Code 50845 — Diagonal, IA
50845 is a standard (street delivery) ZIP code serving Diagonal, Iowa, in Ringgold 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 50845 at a glance
| ZIP code | 50845 |
|---|---|
| Primary city | Diagonal |
| State | Iowa (IA) |
| County | Ringgold FIPS 19159 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 831 |
| Coordinates | 40.816830, -94.352300 |
How ZIP+4 works in 50845
The four digits after the hyphen encode a delivery segment inside 50845. 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 50845 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 50845.
| ZIP | City | Distance |
|---|---|---|
| 50840 | Clearfield, IA | 7.1 mi |
| 50835 | Benton, IA | 7.6 mi |
| 50861 | Shannon City, IA | 8.2 mi |
| 50863 | Tingley, IA | 9.6 mi |
| 50854 | Mount Ayr, IA | 11.1 mi |
| 50851 | Lenox, IA | 11.3 mi |
| 50831 | Arispe, IA | 11.4 mi |
| 50860 | Redding, IA | 13.4 mi |
| 50074 | Ellston, IA | 14.7 mi |
| 50836 | Blockton, IA | 14.9 mi |
| 50862 | Sharpsburg, IA | 15.6 mi |
| 50133 | Kellerton, IA | 16 mi |
Questions about 50845
What is the ZIP+4 code for 50845?
50845 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 50845, you need to look up a specific street address to get them.
What city is 50845?
50845 is assigned to Diagonal, Iowa, in Ringgold 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.