ZIP Code 56138 — Hills, MN
56138 is a standard (street delivery) ZIP code serving Hills, Minnesota, in Rock 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 56138 at a glance
| ZIP code | 56138 |
|---|---|
| Primary city | Hills |
| State | Minnesota (MN) |
| County | Rock FIPS 27133 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 927 |
| Coordinates | 43.532790, -96.383480 |
How ZIP+4 works in 56138
The four digits after the hyphen encode a delivery segment inside 56138. 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 56138 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 56138.
| ZIP | City | Distance |
|---|---|---|
| 56116 | Beaver Creek, MN | 5.9 mi |
| 57068 | Valley Springs, SD | 6.2 mi |
| 51241 | Larchwood, IA | 6.9 mi |
| 56173 | Steen, MN | 7.1 mi |
| 51242 | Lester, IA | 7.3 mi |
| 57005 | Brandon, SD | 11 mi |
| 56156 | Luverne, MN | 11.9 mi |
| 51230 | Alvord, IA | 12.6 mi |
| 57110 | Sioux Falls, SD | 12.8 mi |
| 51246 | Rock Rapids, IA | 13.1 mi |
| 56146 | Kanaranzi, MN | 14.4 mi |
| 57103 | Sioux Falls, SD | 15.5 mi |
Questions about 56138
What is the ZIP+4 code for 56138?
56138 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 56138, you need to look up a specific street address to get them.
What city is 56138?
56138 is assigned to Hills, Minnesota, in Rock 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.