HCN
# HCN

HCN may refer to:

## Science and mathematics

* HCN channel, a cellular ion channel
* Highly composite number, a type of integer
* Hydrogen cyanide

## Transportation

* Halcyonair, a Cape Verdean airline
* Headcorn railway station, in England
* Hengchun Airport, in Taiwan

## Other

* Health Communication Network, an Australian software company
* High Country News, an American newspaper
