LTP may refer to:
Biology and medicine
Lateral tibial plateau, part of a leg bone
Lipid transfer proteins, proteins found in plant tissues
Long-term potentiation (neurophysiology), a long-lasting enhancement in signal transmission between neurons
'The All-Species Living Tree' Project, a project to create a phylogeny of all Bacteria and Archaea
Transportation and vehicles
Local Tangent Plane, a geographical coordinate system commonly used in aviation
Local transport plan, part of transport planning in England
LTP tank, two different World War II-era tank designs:
A Czech factory designation for Panzer 38(t)
A Soviet light tank design by Lieutenant Provornov, never built
Technology
Long-tailed pair, a differential pair amplifier
Linux Test Project, a body of regression tests
Communications
Lightweight Telephony Protocol, a signaling protocol
Licklider Transmission Protocol, a communication protocol for use in deep space links
Long Term Prediction, a method of sound compression and quantization in mobile communications
Other uses
Lunar Transient Phenomena, a short-lived change in appearance of Earth's moon
Leaning Tower of Pisa, a tower in the Italian city of Pisa
Lullabies to Paralyze, an album by American hard rock band Queens of the Stone Age
Liberia Transformation Party. a political party in Liberia