HTR may refer to:
Handwritten text recognition Happy Tiger Records catalog number, e.g. HTR-1006 Harvard Theological Review Hardy Toll Road Hateruma Airport, in Okinawa Prefecture, Japan Healing Through Remembering Head-twitch response, a behavioral proxy of psychedelic-like effects in animals The Herald Times Reporter, a newspaper in Manitowoc, Wisconsin, US High-temperature reactor, see High-temperature gas reactor Historical trauma response Horticultural therapist, see Horticultural therapy HTR High Tech Racing, a video game Hashemite Tribes Regiment, Syrian militant group Human telomerase (hTR) Hypotensive transfusion reaction