ZIP Code 06890 — Southport, CT
06890 is a standard (street delivery) ZIP code serving Southport, Connecticut, in Greater Bridgeport 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 06890 at a glance
| ZIP code | 06890 |
|---|---|
| Primary city | Southport |
| State | Connecticut (CT) |
| County | Greater Bridgeport FIPS 09120 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 4,653 |
| Coordinates | 41.146390, -73.289440 |
How ZIP+4 works in 06890
The four digits after the hyphen encode a delivery segment inside 06890. 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 06890 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 06890.
| ZIP | City | Distance |
|---|---|---|
| 06824 | Fairfield, CT | 2.1 mi |
| 06880 | Westport, CT | 3 mi |
| 06605 | Bridgeport, CT | 3.9 mi |
| 06825 | Fairfield, CT | 4.3 mi |
| 06604 | Bridgeport, CT | 5.1 mi |
| 06851 | Norwalk, CT | 6 mi |
| 06606 | Bridgeport, CT | 6.2 mi |
| 06608 | Bridgeport, CT | 6.3 mi |
| 06607 | Bridgeport, CT | 6.6 mi |
| 06855 | Norwalk, CT | 6.8 mi |
| 06883 | Weston, CT | 7.1 mi |
| 06610 | Bridgeport, CT | 7.4 mi |
Questions about 06890
What is the ZIP+4 code for 06890?
06890 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 06890, you need to look up a specific street address to get them.
What city is 06890?
06890 is assigned to Southport, Connecticut, in Greater Bridgeport 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.