ZIP Code 51449 — Lake City, IA
51449 is a standard (street delivery) ZIP code serving Lake City, Iowa, in Calhoun 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 51449 at a glance
| ZIP code | 51449 |
|---|---|
| Primary city | Lake City |
| State | Iowa (IA) |
| County | Calhoun FIPS 19025 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,950 |
| Coordinates | 42.266140, -94.734750 |
How ZIP+4 works in 51449
The four digits after the hyphen encode a delivery segment inside 51449. 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 51449 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 51449.
| ZIP | City | Distance |
|---|---|---|
| 51451 | Lanesboro, IA | 6 mi |
| 51433 | Auburn, IA | 7 mi |
| 51453 | Lohrville, IA | 9.4 mi |
| 51452 | Lidderdale, IA | 10.2 mi |
| 50579 | Rockwell City, IA | 10.2 mi |
| 50561 | Lytton, IA | 12.2 mi |
| 51443 | Glidden, IA | 13.1 mi |
| 50050 | Churdan, IA | 13.4 mi |
| 50551 | Jolley, IA | 15 mi |
| 51450 | Lake View, IA | 15.3 mi |
| 51436 | Breda, IA | 15.3 mi |
| 51401 | Carroll, IA | 15.5 mi |
Questions about 51449
What is the ZIP+4 code for 51449?
51449 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 51449, you need to look up a specific street address to get them.
What city is 51449?
51449 is assigned to Lake City, Iowa, in Calhoun 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.