JTAC

JTAC may refer to:


 * JTAC Hill, a fort in Helmand Province, Afghanistan
 * Joint Terrorism Analysis Centre, advises the UK government on terrorist threats
 * Joint Terminal Attack Controller, someone who directs aircraft in a military operation
 * Advanced Mobile Phone System, an analogue mobile phone standard, also known Japanese Total Access Communication
 * Juniper Networks Technical Assistance Center
 * Journal of Thermal Analysis and Calorimetry, a scientific journal