TML may refer to:
- Taiwan Major League, a defunct professional baseball league in Taiwan
- Tall Man lettering, a mixed capitalization system used to increase word differentiation
- Thank Me Later, a 2010 album by Drake
- Toronto Maple Leafs, a professional ice hockey team
- TransducerML, an XML based markup language that specifies how to capture, time-tag and describe sensor data
- TransManche Link, a British-French construction consortium responsible for building the Channel Tunnel
- Twitter Markup Language, a markup language used in Twitter
- Topological Media Lab, an art research atelier in Concordia University, Montreal, Canada
- TML Entertainment, record label launched by Canadian rock band Triumph