HTL

HTL may refer to:


 * Language technology
 * HTL Buses, a bus company based in Merseyside, England
 * Bell HTL a light helicopter
 * Halifax Tool Library, a tool-lending library in Nova Scotia, Canada
 * Heritage Trust of Lincolnshire, in England
 * High tension line, used for electric power transmission
 * Histology technologist
 * High Threshold Logic, an electronic logic technology
 * Höhere Technische Lehranstalt, engineering-focused secondary schools in Austria
 * Hydrothermal liquefaction, a thermochemical depolymerisation process
 * Roscommon County – Blodgett Memorial Airport, in Michigan, United States