"Knight Commander of the Order of the Nation", a title in the honours system of Antigua and Barbuda

Kirkland Church of the Nazarene in Kirkland, Washington

Structured Products CORTS has NYSE ticker code KCN

Kingsgate Consolidated Limited has S&P/ASX 200 code KCN

King's Community Network, a Christian group based in Gisborne, New Zealand

Potassium cyanide has chemical formula KCN

Keumgang Cable Network, a South Korean broadcasting network

Kent Community Network, for schools in Kent, England

Chernofski Harbor Seaplane Base in Alaska has IATA code KCN

The Nubi language of Uganda and Kenya has ISO 639-3 code kcn