ZIP Code 50120 — Haverhill, IA
50120 is a standard (street delivery) ZIP code serving Haverhill, Iowa, in Marshall 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 50120 at a glance
| ZIP code | 50120 |
|---|---|
| Primary city | Haverhill |
| State | Iowa (IA) |
| County | Marshall FIPS 19127 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 428 |
| Coordinates | 41.933730, -92.982800 |
How ZIP+4 works in 50120
The four digits after the hyphen encode a delivery segment inside 50120. 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 50120 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 50120.
| ZIP | City | Distance |
|---|---|---|
| 50162 | Melbourne, IA | 4.4 mi |
| 50141 | Laurel, IA | 4.7 mi |
| 50078 | Ferguson, IA | 6.2 mi |
| 50158 | Marshalltown, IA | 9.1 mi |
| 50106 | Gilman, IA | 9.7 mi |
| 50234 | Rhodes, IA | 10.5 mi |
| 50247 | State Center, IA | 11.1 mi |
| 50142 | Le Grand, IA | 11.7 mi |
| 50028 | Baxter, IA | 11.8 mi |
| 50135 | Kellogg, IA | 13.7 mi |
| 50005 | Albion, IA | 13.7 mi |
| 50173 | Montour, IA | 14.3 mi |
Questions about 50120
What is the ZIP+4 code for 50120?
50120 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 50120, you need to look up a specific street address to get them.
What city is 50120?
50120 is assigned to Haverhill, Iowa, in Marshall 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.