ZIP Code 77365 — Porter, TX
77365 is a standard (street delivery) ZIP code serving Porter, Texas, in Montgomery 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 77365 at a glance
| ZIP code | 77365 |
|---|---|
| Primary city | Porter |
| State | Texas (TX) |
| County | Montgomery FIPS 48339 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 46,418 |
| Coordinates | 30.116380, -95.274700 |
How ZIP+4 works in 77365
The four digits after the hyphen encode a delivery segment inside 77365. 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 77365 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 77365.
| ZIP | City | Distance |
|---|---|---|
| 77386 | Spring, TX | 5 mi |
| 77339 | Kingwood, TX | 5.7 mi |
| 77357 | New Caney, TX | 6.2 mi |
| 77338 | Humble, TX | 7.5 mi |
| 77373 | Spring, TX | 7.6 mi |
| 77345 | Kingwood, TX | 8.1 mi |
| 77302 | Conroe, TX | 9.1 mi |
| 77385 | Conroe, TX | 10.2 mi |
| 77372 | Splendora, TX | 10.4 mi |
| 77346 | Humble, TX | 10.4 mi |
| 77336 | Huffman, TX | 10.8 mi |
| 77073 | Houston, TX | 11 mi |
Questions about 77365
What is the ZIP+4 code for 77365?
77365 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 77365, you need to look up a specific street address to get them.
What city is 77365?
77365 is assigned to Porter, Texas, in Montgomery 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.