LTU may mean:
- IATA code for Latur Airport, India
- La Trobe University, a university in Australia
- Lambda the Ultimate, a weblog devoted to programming languages
- Land treatment unit, a term in bioremediation
- Lawrence Technological University, a university in Southfield, Michigan
- Le Quy Don Technical University, a university in Hanoi, Vietnam
- Liaoning Technical University, a university in China
- Licence to use, a type of intellectual property licence
- Lietuvos Teisės Universitetas, present-day Mykolas Romeris University in Lithuania
- Louisiana Tech University, a university in Ruston, Louisiana
- LTU, the country code for Lithuania as used by some governing bodies, notably the IOC and FIFA
- LTU International, a German airline
- LTU Technologies, a software company
- Luleå University of Technology, a university in Sweden