O’Brien County, located in the state of Iowa, contains a range of ZIP codes that are essential for mail delivery, demographics, mapping, and regional planning. Below is a complete list of ZIP codes associated with this county.
These ZIP codes help identify specific areas and communities within the county, ranging from small towns and villages to broader rural stretches. Whether you’re moving to O’Brien County, setting up a business, or analyzing demographic trends, understanding ZIP code distribution is an essential part of the process.
| Zip code |
|---|
| 51201 |
| 51047 |
| 51046 |
| 51248 |
| 51350 |
| 51346 |
| 51231 |
| 51035 |
| 51238 |
| 51014 |
| 51029 |
| 51009 |
| 51022 |
| 51245 |
| 51232 |
| 51058 |
To know more about O’Brien County, click the button below:
Use this tool to find your area details by using zip code.
Note: Some ZIP codes may span across county borders and may be listed under more than one county. This is common in rural or low-population areas where ZIP code regions are broader.
Source: Data compiled from official county records, USPS ZIP code data, and the United States Census Bureau.
Frequently Asked Questions
How many ZIP codes are in O’Brien County County?
There are approximately 16 ZIP codes in this county. Check the table above for the complete list.
Do ZIP codes in O’Brien County overlap with other counties?
Yes, some ZIP codes may span more than one county. This is especially common in less populated or rural areas.