CHN may stand for: China's country code People's Republic of China's ISO 3166-1 alpha-3 and IOC country code Republic of China's IOC country code 1932-1956, now TPE Canadian Health Network Cheshunt railway station, Hertfordshire, National Rail station code CHN analyzer, measuring carbon, hydrogen, and nitrogen City Hindus Network, London, UK Anglican religious orders Community of the Holy Name, an Anglican religious order for women in England, Lesotho and South Africa Community of the Holy Name (Australia), an Anglican religious order for women in Australia, unrelated to the English order Jeonju Airport, South Korea, IATA airport code Chemical formula of hydrogen cyanide and hydrogen isocyanide Climate Heritage Network