ZIP Code 06518 — Hamden, CT
06518 is a standard (street delivery) ZIP code serving Hamden, 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 06518 at a glance
| ZIP code | 06518 |
|---|---|
| Primary city | Hamden |
| State | Connecticut (CT) |
| County | South Central Connecticut FIPS 09170 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 20,126 |
| Coordinates | 41.427440, -72.913390 |
How ZIP+4 works in 06518
The four digits after the hyphen encode a delivery segment inside 06518. 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 06518 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 Hamden
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 06518.
| ZIP | City | Distance |
|---|---|---|
| 06514 | Hamden, CT | 4 mi |
| 06524 | Bethany, CT | 4.1 mi |
| 06473 | North Haven, CT | 4.4 mi |
| 06517 | Hamden, CT | 5.5 mi |
| 06410 | Cheshire, CT | 5.8 mi |
| 06712 | Prospect, CT | 5.9 mi |
| 06492 | Wallingford, CT | 6 mi |
| 06525 | Woodbridge, CT | 7 mi |
| 06403 | Beacon Falls, CT | 7.5 mi |
| 06515 | New Haven, CT | 7.5 mi |
| 06472 | Northford, CT | 7.6 mi |
| 06511 | New Haven, CT | 7.7 mi |
Questions about 06518
What is the ZIP+4 code for 06518?
06518 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 06518, you need to look up a specific street address to get them.
What city is 06518?
06518 is assigned to Hamden, 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.