ZIP Code 52146 — Harpers Ferry, IA
52146 is a standard (street delivery) ZIP code serving Harpers Ferry, Iowa, in Allamakee 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 52146 at a glance
| ZIP code | 52146 |
|---|---|
| Primary city | Harpers Ferry |
| State | Iowa (IA) |
| County | Allamakee FIPS 19005 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 752 |
| Coordinates | 43.188260, -91.195880 |
How ZIP+4 works in 52146
The four digits after the hyphen encode a delivery segment inside 52146. 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 52146 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 52146.
| ZIP | City | Distance |
|---|---|---|
| 52170 | Waterville, IA | 6.2 mi |
| 54626 | Eastman, WI | 8.3 mi |
| 52158 | Marquette, IA | 10 mi |
| 52159 | Monona, IA | 11.2 mi |
| 52151 | Lansing, IA | 11.7 mi |
| 53821 | Prairie Du Chien, WI | 11.7 mi |
| 52157 | Mcgregor, IA | 12 mi |
| 54654 | Seneca, WI | 13.4 mi |
| 54657 | Steuben, WI | 14.6 mi |
| 53826 | Wauzeka, WI | 15.1 mi |
| 54628 | Ferryville, WI | 15.5 mi |
| 52172 | Waukon, IA | 15.6 mi |
Questions about 52146
What is the ZIP+4 code for 52146?
52146 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 52146, you need to look up a specific street address to get them.
What city is 52146?
52146 is assigned to Harpers Ferry, Iowa, in Allamakee 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.