CT or ct may stand for:

• carat (ct)
• centimes (ct)
• computed tomography (e.g. in neuroanatomy, CAT scan)
• Connecticut
• Counter-terrorism (see also: war on terrorism)
• c't
• Ceská Televize
• Abbreviation for "can't talk." See Internet Slang
• Chrono Trigger, a popular role playing video game produced in 1995 for the SNES.