ZIP Code 06511 — New Haven, CT
06511 is a standard (street delivery) ZIP code serving New Haven, Connecticut, in South Central Connecticut 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 06511 at a glance
| ZIP code | 06511 |
|---|---|
| Primary city | New Haven |
| State | Connecticut (CT) |
| County | South Central Connecticut FIPS 09170 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 54,730 |
| Coordinates | 41.316630, -72.925870 |
How ZIP+4 works in 06511
The four digits after the hyphen encode a delivery segment inside 06511. 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 06511 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 New Haven
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 06511.
| ZIP | City | Distance |
|---|---|---|
| 06510 | New Haven, CT | 0.7 mi |
| 06519 | New Haven, CT | 1.6 mi |
| 06517 | Hamden, CT | 2.4 mi |
| 06515 | New Haven, CT | 2.4 mi |
| 06513 | New Haven, CT | 3 mi |
| 06516 | West Haven, CT | 3.6 mi |
| 06512 | East Haven, CT | 3.7 mi |
| 06514 | Hamden, CT | 4 mi |
| 06525 | Woodbridge, CT | 5.2 mi |
| 06473 | North Haven, CT | 5.7 mi |
| 06477 | Orange, CT | 5.7 mi |
| 06405 | Branford, CT | 7 mi |
Questions about 06511
What is the ZIP+4 code for 06511?
06511 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 06511, you need to look up a specific street address to get them.
What city is 06511?
06511 is assigned to New Haven, Connecticut, in South Central Connecticut 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.