ZIP Code 46278 — Indianapolis, IN
46278 is a standard (street delivery) ZIP code serving Indianapolis, Indiana, in Marion 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 46278 at a glance
| ZIP code | 46278 |
|---|---|
| Primary city | Indianapolis |
| State | Indiana (IN) |
| County | Marion FIPS 18097 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Indiana/Indianapolis |
| Population | 8,450 |
| Coordinates | 39.893890, -86.296060 |
How ZIP+4 works in 46278
The four digits after the hyphen encode a delivery segment inside 46278. 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 46278 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 Indianapolis
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 46278.
| ZIP | City | Distance |
|---|---|---|
| 46268 | Indianapolis, IN | 3.4 mi |
| 46254 | Indianapolis, IN | 3.5 mi |
| 46112 | Brownsburg, IN | 5 mi |
| 46228 | Indianapolis, IN | 5.9 mi |
| 46234 | Indianapolis, IN | 6 mi |
| 46260 | Indianapolis, IN | 6.2 mi |
| 46077 | Zionsville, IN | 6.2 mi |
| 46214 | Indianapolis, IN | 7.1 mi |
| 46224 | Indianapolis, IN | 7.1 mi |
| 46290 | Indianapolis, IN | 7.6 mi |
| 46208 | Indianapolis, IN | 8.1 mi |
| 46222 | Indianapolis, IN | 8.3 mi |
Questions about 46278
What is the ZIP+4 code for 46278?
46278 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 46278, you need to look up a specific street address to get them.
What city is 46278?
46278 is assigned to Indianapolis, Indiana, in Marion 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.