ZIP Code 52237 — Hopkinton, IA
52237 is a standard (street delivery) ZIP code serving Hopkinton, Iowa, in Delaware 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 52237 at a glance
| ZIP code | 52237 |
|---|---|
| Primary city | Hopkinton |
| State | Iowa (IA) |
| County | Delaware FIPS 19055 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,830 |
| Coordinates | 42.343680, -91.251930 |
How ZIP+4 works in 52237
The four digits after the hyphen encode a delivery segment inside 52237. 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 52237 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 52237.
| ZIP | City | Distance |
|---|---|---|
| 52223 | Delhi, IA | 6 mi |
| 52078 | Worthington, IA | 7.8 mi |
| 52310 | Monticello, IA | 9 mi |
| 52036 | Delaware, IA | 10 mi |
| 52252 | Langworthy, IA | 10.2 mi |
| 52041 | Earlville, IA | 11.1 mi |
| 52219 | Prairieburg, IA | 11.5 mi |
| 52330 | Ryan, IA | 12.7 mi |
| 52040 | Dyersville, IA | 12.9 mi |
| 52033 | Cascade, IA | 13.5 mi |
| 52046 | Farley, IA | 13.9 mi |
| 52057 | Manchester, IA | 14.5 mi |
Questions about 52237
What is the ZIP+4 code for 52237?
52237 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 52237, you need to look up a specific street address to get them.
What city is 52237?
52237 is assigned to Hopkinton, Iowa, in Delaware 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.