ZIP Code 00791 — Humacao, PR
00791 is a standard (street delivery) ZIP code serving Humacao, Puerto Rico, in Humacao 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 00791 at a glance
| ZIP code | 00791 |
|---|---|
| Primary city | Humacao |
| State | Puerto Rico (PR) |
| County | Humacao FIPS 72069 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Puerto_Rico |
| Population | 45,455 |
| Coordinates | 18.143910, -65.813980 |
How ZIP+4 works in 00791
The four digits after the hyphen encode a delivery segment inside 00791. 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 00791 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 00791.
| ZIP | City | Distance |
|---|---|---|
| 00741 | Punta Santiago, PR | 4.1 mi |
| 00771 | Las Piedras, PR | 4.7 mi |
| 00718 | Naguabo, PR | 7 mi |
| 00767 | Yabucoa, PR | 7.4 mi |
| 00777 | Juncos, PR | 8.3 mi |
| 00754 | San Lorenzo, PR | 10.6 mi |
| 00707 | Maunabo, PR | 11.2 mi |
| 00735 | Ceiba, PR | 11.8 mi |
| 00778 | Gurabo, PR | 13.6 mi |
| 00729 | Canovanas, PR | 14 mi |
| 00745 | Rio Grande, PR | 14 mi |
| 00773 | Luquillo, PR | 14.7 mi |
Questions about 00791
What is the ZIP+4 code for 00791?
00791 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 00791, you need to look up a specific street address to get them.
What city is 00791?
00791 is assigned to Humacao, Puerto Rico, in Humacao 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.