CIX can refer to:
CIX (website), an online conferencing system that started as an early British dial-up bulletin board
FAP Captain José Abelardo Quiñones González International Airport, the airport of Chiclayo, in north of Peru
Commercial Internet eXchange, a forerunner of the commercial Internet in the US
109 (disambiguation) in Roman numerals
CIX (band), a South Korean boy group
Croatian Internet eXchange, Internet exchange point in Croatia
