ZIP Code 33149 — Key Biscayne, FL
33149 is a standard (street delivery) ZIP code serving Key Biscayne, Florida, in Miami-Dade 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 33149 at a glance
| ZIP code | 33149 |
|---|---|
| Primary city | Key Biscayne |
| State | Florida (FL) |
| County | Miami-Dade FIPS 12086 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 14,791 |
| Coordinates | 25.724790, -80.161180 |
How ZIP+4 works in 33149
The four digits after the hyphen encode a delivery segment inside 33149. 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 33149 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 33149.
| ZIP | City | Distance |
|---|---|---|
| 33109 | Miami Beach, FL | 2.8 mi |
| 33131 | Miami, FL | 3.1 mi |
| 33129 | Miami, FL | 3.1 mi |
| 33132 | Miami, FL | 3.7 mi |
| 33130 | Miami, FL | 4 mi |
| 33139 | Miami Beach, FL | 4.2 mi |
| 33128 | Miami, FL | 4.5 mi |
| 33101 | Miami, FL | 4.5 mi |
| 33145 | Miami, FL | 5 mi |
| 33136 | Miami, FL | 5.1 mi |
| 33133 | Miami, FL | 5.1 mi |
| 33135 | Miami, FL | 5.4 mi |
Questions about 33149
What is the ZIP+4 code for 33149?
33149 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 33149, you need to look up a specific street address to get them.
What city is 33149?
33149 is assigned to Key Biscayne, Florida, in Miami-Dade 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.