TD or td may stand for:

• Chad, ISO country code
• Tank destroyer
• Tardive dyskinesia, serious adverse effects usually caused by older antipsychotic drugs
• Teachta Dála (TD), Member of lower house of Irish Parliament, Dáil Éireann
• <td> (table cell delimiter tag), see HTML
• Territorial Decoration, awarded for twelve years' service in the British Territorial Army
• Touchdown
• Toronto-Dominion Bank and TD Bank Financial Group
• Tower Defense
• Tracking dog
• Trust deed
• Turbo diesel
• Technical Director, cinematography and visual effects term
• Departments:
  • Treasury Department
  • Transport Department