ZIP Code 00840 — Frederiksted, VI
00840 is a standard (street delivery) ZIP code serving Frederiksted, VI, in St. Croix 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 00840 at a glance
| ZIP code | 00840 |
|---|---|
| Primary city | Frederiksted |
| State | VI (VI) |
| County | St. Croix FIPS 78010 |
| ZIP type | Standard (street delivery) |
| Time zone | America/St_Thomas |
| Coordinates | 17.726490, -64.847170 |
How ZIP+4 works in 00840
The four digits after the hyphen encode a delivery segment inside 00840. 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 00840 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 00840.
| ZIP | City | Distance |
|---|---|---|
| 00850 | Kingshill, VI | 3.7 mi |
| 00851 | Kingshill, VI | 4.2 mi |
| 00820 | Christiansted, VI | 9.3 mi |
| 00765 | Vieques, PR | 47.1 mi |
Questions about 00840
What is the ZIP+4 code for 00840?
00840 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 00840, you need to look up a specific street address to get them.
What city is 00840?
00840 is assigned to Frederiksted, VI, in St. Croix 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.