PSIA
# PSIA

PSIA or psia may refer to:

* Physical Security Interoperability Alliance, industrial standardization initiative promoting interoperability of IP-enabled security devices
* Pounds per square inch absolute (including atmospheric pressure)
* Professional Ski Instructors of America, an organization offering training and certification for U.S. Ski Instructors
* Philippine Software Industry Association
* Paris School of International Affairs
* Private Schools Interscholastic Association
* Palm Springs International Airport
* Public Security Intelligence Agency, the national intelligence agency of Japan
