ZIP Code 52045 — Epworth, IA
52045 is a standard (street delivery) ZIP code serving Epworth, Iowa, in Dubuque 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 52045 at a glance
| ZIP code | 52045 |
|---|---|
| Primary city | Epworth |
| State | Iowa (IA) |
| County | Dubuque FIPS 19061 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,777 |
| Coordinates | 42.454850, -90.931130 |
How ZIP+4 works in 52045
The four digits after the hyphen encode a delivery segment inside 52045. 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 52045 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 52045.
| ZIP | City | Distance |
|---|---|---|
| 52046 | Farley, IA | 4.2 mi |
| 52068 | Peosta, IA | 6.5 mi |
| 52039 | Durango, IA | 6.9 mi |
| 52002 | Dubuque, IA | 9.4 mi |
| 52078 | Worthington, IA | 10.2 mi |
| 52053 | Holy Cross, IA | 10.6 mi |
| 52040 | Dyersville, IA | 11.3 mi |
| 52032 | Bernard, IA | 12.2 mi |
| 52065 | New Vienna, IA | 12.4 mi |
| 52056 | Luxemburg, IA | 12.6 mi |
| 52033 | Cascade, IA | 12.6 mi |
| 52073 | Sherrill, IA | 12.9 mi |
Questions about 52045
What is the ZIP+4 code for 52045?
52045 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 52045, you need to look up a specific street address to get them.
What city is 52045?
52045 is assigned to Epworth, Iowa, in Dubuque 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.