ZIP Code 33957 — Sanibel, FL
33957 is a standard (street delivery) ZIP code serving Sanibel, Florida, in Lee 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 33957 at a glance
| ZIP code | 33957 |
|---|---|
| Primary city | Sanibel |
| State | Florida (FL) |
| County | Lee FIPS 12071 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 6,418 |
| Coordinates | 26.453400, -82.102280 |
How ZIP+4 works in 33957
The four digits after the hyphen encode a delivery segment inside 33957. 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 33957 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 33957.
| ZIP | City | Distance |
|---|---|---|
| 33956 | Saint James City, FL | 6.4 mi |
| 33924 | Captiva, FL | 8.7 mi |
| 33914 | Cape Coral, FL | 9.6 mi |
| 33931 | Fort Myers Beach, FL | 11.9 mi |
| 33908 | Fort Myers, FL | 11.9 mi |
| 33904 | Cape Coral, FL | 12.9 mi |
| 33991 | Cape Coral, FL | 13.5 mi |
| 33919 | Fort Myers, FL | 14.2 mi |
| 33922 | Bokeelia, FL | 15 mi |
| 33990 | Cape Coral, FL | 15.5 mi |
| 33993 | Cape Coral, FL | 15.5 mi |
| 33907 | Fort Myers, FL | 16.2 mi |
Questions about 33957
What is the ZIP+4 code for 33957?
33957 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 33957, you need to look up a specific street address to get them.
What city is 33957?
33957 is assigned to Sanibel, Florida, in Lee 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.