ZIP Code 51241 — Larchwood, IA
51241 is a standard (street delivery) ZIP code serving Larchwood, Iowa, in Lyon 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 51241 at a glance
| ZIP code | 51241 |
|---|---|
| Primary city | Larchwood |
| State | Iowa (IA) |
| County | Lyon FIPS 19119 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 2,103 |
| Coordinates | 43.449920, -96.460010 |
How ZIP+4 works in 51241
The four digits after the hyphen encode a delivery segment inside 51241. 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 51241 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 51241.
| ZIP | City | Distance |
|---|---|---|
| 51242 | Lester, IA | 6.2 mi |
| 56138 | Hills, MN | 6.9 mi |
| 57068 | Valley Springs, SD | 8.7 mi |
| 51230 | Alvord, IA | 9.5 mi |
| 51240 | Inwood, IA | 9.7 mi |
| 57110 | Sioux Falls, SD | 11.1 mi |
| 57032 | Harrisburg, SD | 11.5 mi |
| 57005 | Brandon, SD | 11.7 mi |
| 56173 | Steen, MN | 12.1 mi |
| 56116 | Beaver Creek, MN | 12.3 mi |
| 57108 | Sioux Falls, SD | 12.5 mi |
| 57103 | Sioux Falls, SD | 13.1 mi |
Questions about 51241
What is the ZIP+4 code for 51241?
51241 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 51241, you need to look up a specific street address to get them.
What city is 51241?
51241 is assigned to Larchwood, Iowa, in Lyon 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.