PMK may refer to:
Pairwise Master Key in the IEEE 802.11i-2004 protocol Palm Island Airport, IATA airport code Pattali Makkal Katchi, a political party in Tamil Nadu, India People's Movement of Kosovo, a political organization Piperonyl methyl ketone, a chemical compound PMK gas mask, a Soviet made single-filter gas mask Popular Mechanics for Kids, a Canadian TV series