LCT may refer to:
- Labour Congress of Thailand
- Lactase - The enzyme used in the breakdown of the sugar lactose
- Landing craft tank - a vehicle-carrying amphibious warfare boat
- The Lake Champlain Transportation Company, a ferry company operating in the northeast United States
- A Laser Communication Terminal, the device for optical communication, especially between satellites
- Ligue Communiste des Travailleurs, a now defunct political party in Senegal
- Local Civil Time
- Lorain County Transit, a public transportation provider in Lorain County, Ohio
- Link's Crossbow Training, a video game for Nintendo Wii which comes packaged with the Wii Zapper
- In mathematics, the linear canonical transformation
- In mathematics, the limit comparison test, a test of series convergence.
- In biochemistry long-chain triglycerides (LCTs) refers to glycerol esters of long-chain (14 or more carbons) fatty acids, cf. MCT.
- Leeds College of Technology