ACN

ACN may refer to:

Aviation

ACN, the IATA airport code for Ciudad Acuña International Airport, Coahuila, Mexico
Aircraft Classification Number, pavement load of an aircraft

Accenture, professional services company, listed on the NYSE as ACN
ACN Inc., multi-level marketing company providing telecommunications and other services
Agencia Carabobeña de Noticias, news agency, Valencia, Venezuela
Agència Catalana de Notícies, news agency, Barcelona, Spain
American Collectibles Network, former name for Jewelry Television, US
Atlantis Cable News, fictional news channel on The Newsroom (American TV series)
Australian Company Number, unique identifier for companies registered in Australia

Africa Cup of Nations, biennial football tournament
Hockey Africa Cup of Nations, biennial field hockey tournament:
- Men's Hockey Africa Cup of Nations
- Women's Hockey Africa Cup of Nations

Achang language, a Tibeto-Burman language of China
Achnasheen railway station, UK, National Rail code
Acineta, a genus of orchid
Action Congress of Nigeria, political party of Nigeria
Agenzia per la Cybersicurezza Nazionale, Italian government cybersecurity agency, Italy
Aid to the Church in Need, international Catholic charity based in Königstein im Taunus, Germany
Algebraic notation (chess), the standard notation for recording chess games (Algebraic chess notation)
Andean Community of Nations, free trade area
Anglican Communion Network, network of Anglican and Episcopalian dioceses and parishes
ante Christum natum, seldom-used Latin equivalent of BC
Architecture for Control Networks, network protocol for theatrical control