KLAS may refer to:
- KLAS-TV, a television station (channel 8 analog/7 digital) licensed to Las Vegas, Nevada, United States
- The ICAO airport code for McCarran International Airport, in Las Vegas, Nevada, United States
- Kumon Leysin Academy of Switzerland, a private high school in Leysin, Switzerland
- Kelompok Linux Arek Suroboyo or Linux User Group of Surabaya, Indonesia
- KLAS Enterprises, LLC, a healthcare technology research firm