NTD may refer to:
Biology and medicine N-terminal domain, a region at one end of a protein Neglected tropical diseases, a group of endemic infectious diseases that primarily affect the poor Neon tetra disease, a disease affecting tropical aquarium fish Neural tube defect, a group of medical conditions
Television broadcasters NTD (Australian TV station) New Tang Dynasty Television
Technology Network Termination Device, a telecommunications device Neutron transmutation doping, a method to make semiconductors Nintendo Technology Development, a subsidiary of Nintendo located in Redmond, Washington, U.S. Notice and take down, removal by Internet hosts of allegedly illegal material National Technology Day in Libya.
Other uses National Theatre of the Deaf, a touring theatre company in the United States National Transit Database, the data repository of the Federal Transit Administration in the United States New Era for Democracy, a political party in Burkina Faso New Taiwan dollar, the currency of Taiwan