PHK may refer to:

• Palm Beach County Glades Airport (IATA code)
• Poul-Henning Kamp, Danish FreeBSD developer
• Polyhydroxyketone, a class of carbohydrates
• Phosphorylase kinase, PhK, an enzyme
• Publik Hysterik Kaos, a group of supporters of the Belgian football club Royal Standard de Liège

• Lexical grammar
• Lexical-gustatory synesthesia
• Lexical item
• Lexical items
• Lexicalization
• Lexically
• Lexical parser
• Lexical Race
• Lexical rule
• Lexical scope
• Lexical set
• Lexical sets
• Lexical similarity
• Lexical unit
• Lexical verb
• Lexicant
• Lexicode
• Lexicographic
• Lexicographical ordering
• Lexicographical product
• Lexicographical product of graphs
• Lexicographic code
• Lexicographic preferences
• Lexicographic product
• Lexicographic product of graphs