HLN

HLN may refer to:

• HLN (TV channel), a cable network formerly known as (CNN) Headline News, and originally as CNN2
• The IATA airport code for Helena Regional Airport
• The Horizon League Network—see Horizon League#Horizon League Network
• The shorthand notation of Phenolphthalein
• Het Laatste Nieuws ("The Latest News"), a Dutch language newspaper based in Brussels, Belgium
• Hlavní nádraží (disambiguation) (Czech for a main or central railway station)
• The Hikami-Larkin-Nagaoka equation describing Weak localization.