ZIP Code 51030 — Lawton, IA
51030 is a standard (street delivery) ZIP code serving Lawton, Iowa, in Woodbury 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 51030 at a glance
| ZIP code | 51030 |
|---|---|
| Primary city | Lawton |
| State | Iowa (IA) |
| County | Woodbury FIPS 19193 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,468 |
| Coordinates | 42.497910, -96.193650 |
How ZIP+4 works in 51030
The four digits after the hyphen encode a delivery segment inside 51030. 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 51030 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 51030.
| ZIP | City | Distance |
|---|---|---|
| 51007 | Bronson, IA | 6.6 mi |
| 51106 | Sioux City, IA | 6.9 mi |
| 51039 | Moville, IA | 7.7 mi |
| 51105 | Sioux City, IA | 8.9 mi |
| 51024 | Hinton, IA | 9.2 mi |
| 51108 | Sioux City, IA | 9.2 mi |
| 51101 | Sioux City, IA | 10.2 mi |
| 51054 | Sergeant Bluff, IA | 10.8 mi |
| 51104 | Sioux City, IA | 11 mi |
| 51111 | Sioux City, IA | 11.5 mi |
| 51015 | Climbing Hill, IA | 12.3 mi |
| 51028 | Kingsley, IA | 12.4 mi |
Questions about 51030
What is the ZIP+4 code for 51030?
51030 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 51030, you need to look up a specific street address to get them.
What city is 51030?
51030 is assigned to Lawton, Iowa, in Woodbury 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.