ZIP Code 77523 — Baytown, TX
77523 is a standard (street delivery) ZIP code serving Baytown, Texas, in Chambers 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 77523 at a glance
| ZIP code | 77523 |
|---|---|
| Primary city | Baytown |
| State | Texas (TX) |
| County | Chambers FIPS 48071 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 30,186 |
| Coordinates | 29.775980, -94.863200 |
How ZIP+4 works in 77523
The four digits after the hyphen encode a delivery segment inside 77523. 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 77523 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.
Other ZIP codes in Baytown
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 77523.
| ZIP | City | Distance |
|---|---|---|
| 77580 | Mont Belvieu, TX | 5.7 mi |
| 77521 | Baytown, TX | 6.5 mi |
| 77520 | Baytown, TX | 8.7 mi |
| 77597 | Wallisville, TX | 10.7 mi |
| 77562 | Highlands, TX | 12 mi |
| 77571 | La Porte, TX | 13.1 mi |
| 77530 | Channelview, TX | 14.9 mi |
| 77514 | Anahuac, TX | 15.4 mi |
| 77532 | Crosby, TX | 15.8 mi |
| 77507 | Pasadena, TX | 16.1 mi |
| 77536 | Deer Park, TX | 16.4 mi |
| 77586 | Seabrook, TX | 16.8 mi |
Questions about 77523
What is the ZIP+4 code for 77523?
77523 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 77523, you need to look up a specific street address to get them.
What city is 77523?
77523 is assigned to Baytown, Texas, in Chambers 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.