ZIP Code 77331 — Coldspring, TX
77331 is a standard (street delivery) ZIP code serving Coldspring, Texas, in San Jacinto 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 77331 at a glance
| ZIP code | 77331 |
|---|---|
| Primary city | Coldspring |
| State | Texas (TX) |
| County | San Jacinto FIPS 48407 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 7,556 |
| Coordinates | 30.619280, -95.177060 |
How ZIP+4 works in 77331
The four digits after the hyphen encode a delivery segment inside 77331. 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 77331 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 77331.
| ZIP | City | Distance |
|---|---|---|
| 77364 | Pointblank, TX | 10.5 mi |
| 77359 | Oakhurst, TX | 12.5 mi |
| 77371 | Shepherd, TX | 14.5 mi |
| 77328 | Cleveland, TX | 14.6 mi |
| 77335 | Goodrich, TX | 15.2 mi |
| 77334 | Dodge, TX | 15.7 mi |
| 77378 | Willis, TX | 16.1 mi |
| 77360 | Onalaska, TX | 16.2 mi |
| 77358 | New Waverly, TX | 17.1 mi |
| 77367 | Riverside, TX | 20.4 mi |
| 77303 | Conroe, TX | 20.7 mi |
| 77350 | Leggett, TX | 21.2 mi |
Questions about 77331
What is the ZIP+4 code for 77331?
77331 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 77331, you need to look up a specific street address to get them.
What city is 77331?
77331 is assigned to Coldspring, Texas, in San Jacinto 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.