ECCC may refer to:
East Central Community College, a junior college in Decatur, Mississippi, USA Eastern Collegiate Cycling Conference, a college-level bicycle-racing association in the eastern USA Electronic Colloquium on Computational Complexity, an electronic archive of computer science papers Electronic Commerce Council of Canada, the former name of GS1 Canada, a trade association Emerald City Comic Con, an annual comic book and pop culture convention held annually in Seattle, Washington, USA. Environment and Climate Change Canada, a department of the Government of Canada Essex County Cricket Club, a club for the sport of cricket in Essex, England European Club Cup of Champions, a table tennis competition European Champion Clubs Cup (athletics), an athletics competition European Chess Club Cup, a team chess tournament European Cybersecurity Competence Centre, an agency of the European Union Evangelical Christian Church in Canada, the Canadian branch of Evangelical Christianity Extraordinary Chambers in the Courts of Cambodia, better known as the Khmer Rouge Tribunal Taiwan–Hong Kong Economic and Cultural Co-operation Council