ZIP Code 46327 — Hammond, IN
46327 is a standard (street delivery) ZIP code serving Hammond, Indiana, in Lake 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 46327 at a glance
| ZIP code | 46327 |
|---|---|
| Primary city | Hammond |
| State | Indiana (IN) |
| County | Lake FIPS 18089 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 10,597 |
| Coordinates | 41.640480, -87.506770 |
How ZIP+4 works in 46327
The four digits after the hyphen encode a delivery segment inside 46327. 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 46327 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.
Other ZIP codes in Hammond
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 46327.
| ZIP | City | Distance |
|---|---|---|
| 46320 | Hammond, IN | 2.2 mi |
| 46394 | Whiting, IN | 2.6 mi |
| 46312 | East Chicago, IN | 2.7 mi |
| 60409 | Calumet City, IL | 3 mi |
| 60633 | Chicago, IL | 3.2 mi |
| 46324 | Hammond, IN | 4 mi |
| 46323 | Hammond, IN | 4.5 mi |
| 60419 | Dolton, IL | 4.8 mi |
| 60438 | Lansing, IL | 5.6 mi |
| 60617 | Chicago, IL | 5.6 mi |
| 46406 | Gary, IN | 5.7 mi |
| 60473 | South Holland, IL | 5.7 mi |
Questions about 46327
What is the ZIP+4 code for 46327?
46327 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 46327, you need to look up a specific street address to get them.
What city is 46327?
46327 is assigned to Hammond, Indiana, in Lake 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.