FTT may refer to:
Biology and medicine Failure to thrive, in children False tagging theory, a neuroanatomical model Fuzzy-trace theory, a theory of cognition
Business and finance Fair Tax Town, a Welsh political movement Financial transaction tax FTT (token), code of the cryptocurrency exchange FTXs' exchange token
Other uses First-tier Tribunal, in the UK Free Territory of Trieste, an independent territory in Southern Europe