The official zip+4 for ALL of Texas State University (except Admissions) is 78666-4684. Refer to Mail Stop Codes below for the unique code to identify your department and the sample as to how they are to be used.
ZIP codes are constantly changing to serve a rapidly growing population. For the most accurate and up-to-date list, please visit the official US Postal Service Zip+4 search engine.
Several departments on the TX State campus have been assigned a Mail Stop Code. When providing senders with your campus address, please refer to the following list.
Below is an example of how to use your Mail Stop Code in your address:
Texas State University
601 University Dr
San Marcos, TX 78666-4684