ZIP Code 52037 — Delmar, IA
52037 is a standard (street delivery) ZIP code serving Delmar, Iowa, in Clinton 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 52037 at a glance
| ZIP code | 52037 |
|---|---|
| Primary city | Delmar |
| State | Iowa (IA) |
| County | Clinton FIPS 19045 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,172 |
| Coordinates | 41.967120, -90.628990 |
How ZIP+4 works in 52037
The four digits after the hyphen encode a delivery segment inside 52037. 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 52037 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 52037.
| ZIP | City | Distance |
|---|---|---|
| 52774 | Welton, IA | 4.5 mi |
| 52731 | Charlotte, IA | 7.4 mi |
| 52751 | Grand Mound, IA | 8.4 mi |
| 52254 | Lost Nation, IA | 9.1 mi |
| 52060 | Maquoketa, IA | 9.7 mi |
| 52742 | De Witt, IA | 10.9 mi |
| 52069 | Preston, IA | 12.1 mi |
| 52750 | Goose Lake, IA | 12.3 mi |
| 52074 | Spragueville, IA | 12.7 mi |
| 52729 | Calamus, IA | 12.9 mi |
| 52030 | Andrew, IA | 13 mi |
| 52207 | Baldwin, IA | 13.5 mi |
Questions about 52037
What is the ZIP+4 code for 52037?
52037 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 52037, you need to look up a specific street address to get them.
What city is 52037?
52037 is assigned to Delmar, Iowa, in Clinton 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.