ZIP Code 77659 — Sour Lake, TX
77659 is a standard (street delivery) ZIP code serving Sour Lake, Texas, in Hardin 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 77659 at a glance
| ZIP code | 77659 |
|---|---|
| Primary city | Sour Lake |
| State | Texas (TX) |
| County | Hardin FIPS 48199 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 5,650 |
| Coordinates | 30.157750, -94.432790 |
How ZIP+4 works in 77659
The four digits after the hyphen encode a delivery segment inside 77659. 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 77659 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 77659.
| ZIP | City | Distance |
|---|---|---|
| 77519 | Batson, TX | 9.9 mi |
| 77613 | China, TX | 10.3 mi |
| 77533 | Daisetta, TX | 10.7 mi |
| 77585 | Saratoga, TX | 11.4 mi |
| 77713 | Beaumont, TX | 12.2 mi |
| 77629 | Nome, TX | 12.6 mi |
| 77538 | Devers, TX | 13.1 mi |
| 77564 | Hull, TX | 14.2 mi |
| 77625 | Kountze, TX | 14.9 mi |
| 77657 | Lumberton, TX | 15.3 mi |
| 77706 | Beaumont, TX | 16.3 mi |
| 77582 | Raywood, TX | 16.6 mi |
Questions about 77659
What is the ZIP+4 code for 77659?
77659 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 77659, you need to look up a specific street address to get them.
What city is 77659?
77659 is assigned to Sour Lake, Texas, in Hardin 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.