- ZCT stands for Zero-Cost Textbook (education)
- ZCT stands for Zimbabwe Council for Tourism (Harare, Zimbabwe)
- ZCT stands for Zone Comparison Technique (polygraphs)
- ZCT stands for Zero-Current Transition
- ZCT stands for Zero Count Table (deferred reference counting)
- ZCT stands for Zimbabwe Conservation Taskforce
- ZCT stands for Zinc Citrate Trihydrate (dentistry)
ZCT