ZIP Code 06791 — Harwinton, CT
06791 is a standard (street delivery) ZIP code serving Harwinton, Connecticut, in Northwest Hills 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 06791 at a glance
| ZIP code | 06791 |
|---|---|
| Primary city | Harwinton |
| State | Connecticut (CT) |
| County | Northwest Hills FIPS 09160 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 5,602 |
| Coordinates | 41.755090, -73.058380 |
How ZIP+4 works in 06791
The four digits after the hyphen encode a delivery segment inside 06791. 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 06791 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 06791.
| ZIP | City | Distance |
|---|---|---|
| 06778 | Northfield, CT | 3.7 mi |
| 06013 | Burlington, CT | 5.1 mi |
| 06787 | Thomaston, CT | 6 mi |
| 06786 | Terryville, CT | 6.3 mi |
| 06057 | New Hartford, CT | 6.7 mi |
| 06790 | Torrington, CT | 6.7 mi |
| 06782 | Plymouth, CT | 7 mi |
| 06010 | Bristol, CT | 7.9 mi |
| 06759 | Litchfield, CT | 8.1 mi |
| 06085 | Unionville, CT | 8.7 mi |
| 06763 | Morris, CT | 8.9 mi |
| 06061 | Pine Meadow, CT | 9.5 mi |
Questions about 06791
What is the ZIP+4 code for 06791?
06791 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 06791, you need to look up a specific street address to get them.
What city is 06791?
06791 is assigned to Harwinton, Connecticut, in Northwest Hills 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.