ZIP Code 33001 — Long Key, FL
33001 is a standard (street delivery) ZIP code serving Long Key, Florida, in Monroe 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 33001 at a glance
| ZIP code | 33001 |
|---|---|
| Primary city | Long Key |
| State | Florida (FL) |
| County | Monroe FIPS 12087 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 250 |
| Coordinates | 24.820410, -80.809920 |
How ZIP+4 works in 33001
The four digits after the hyphen encode a delivery segment inside 33001. 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 33001 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 33001.
| ZIP | City | Distance |
|---|---|---|
| 33036 | Islamorada, FL | 12.8 mi |
| 33051 | Key Colony Beach, FL | 14.9 mi |
| 33050 | Marathon, FL | 15.4 mi |
| 33070 | Tavernier, FL | 22.1 mi |
| 33043 | Big Pine Key, FL | 35.3 mi |
| 33037 | Key Largo, FL | 37.2 mi |
Questions about 33001
What is the ZIP+4 code for 33001?
33001 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 33001, you need to look up a specific street address to get them.
What city is 33001?
33001 is assigned to Long Key, Florida, in Monroe 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.