ZIP Code 51544 — Lewis, IA
51544 is a standard (street delivery) ZIP code serving Lewis, Iowa, in Cass 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 51544 at a glance
| ZIP code | 51544 |
|---|---|
| Primary city | Lewis |
| State | Iowa (IA) |
| County | Cass FIPS 19029 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 793 |
| Coordinates | 41.313160, -95.108170 |
How ZIP+4 works in 51544
The four digits after the hyphen encode a delivery segment inside 51544. 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 51544 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 51544.
| ZIP | City | Distance |
|---|---|---|
| 51535 | Griswold, IA | 6.1 mi |
| 50022 | Atlantic, IA | 9 mi |
| 51577 | Walnut, IA | 11.5 mi |
| 51552 | Marne, IA | 11.9 mi |
| 51532 | Elliott, IA | 12.4 mi |
| 50843 | Cumberland, IA | 12.4 mi |
| 50847 | Grant, IA | 13.5 mi |
| 50274 | Wiota, IA | 13.8 mi |
| 51536 | Hancock, IA | 13.9 mi |
| 51560 | Oakland, IA | 15 mi |
| 51521 | Avoca, IA | 16.8 mi |
| 51525 | Carson, IA | 17 mi |
Questions about 51544
What is the ZIP+4 code for 51544?
51544 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 51544, you need to look up a specific street address to get them.
What city is 51544?
51544 is assigned to Lewis, Iowa, in Cass 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.