ZIP Code 46071 — Thorntown, IN
46071 is a standard (street delivery) ZIP code serving Thorntown, Indiana, in Boone 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 46071 at a glance
| ZIP code | 46071 |
|---|---|
| Primary city | Thorntown |
| State | Indiana (IN) |
| County | Boone FIPS 18011 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Indiana/Indianapolis |
| Population | 3,072 |
| Coordinates | 40.119410, -86.605490 |
How ZIP+4 works in 46071
The four digits after the hyphen encode a delivery segment inside 46071. 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 46071 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 46071.
| ZIP | City | Distance |
|---|---|---|
| 46035 | Colfax, IN | 6.2 mi |
| 47940 | Darlington, IN | 7.3 mi |
| 46102 | Advance, IN | 8.6 mi |
| 46052 | Lebanon, IN | 9.2 mi |
| 46147 | Jamestown, IN | 10.4 mi |
| 47930 | Clarks Hill, IN | 10.9 mi |
| 47968 | New Ross, IN | 13.1 mi |
| 46041 | Frankfort, IN | 13.6 mi |
| 47983 | Stockwell, IN | 14.5 mi |
| 47955 | Linden, IN | 14.7 mi |
| 46050 | Kirklin, IN | 14.9 mi |
| 46075 | Whitestown, IN | 15.7 mi |
Questions about 46071
What is the ZIP+4 code for 46071?
46071 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 46071, you need to look up a specific street address to get them.
What city is 46071?
46071 is assigned to Thorntown, Indiana, in Boone 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.