ALK

ALK or Alk may refer to:


 * ALK Airlines, a Bulgarian charter airline
 * Anaplastic lymphoma kinase, a human gene
 * Alk-, a root word used in organic chemistry
 * Alaska Air Group ticker symbol
 * Aslockton railway station, Nottinghamshire, England, National Rail code
 * ALK or ALK-Abelló, a Danish pharmaceutical company
 * Automated lamellar keratoplasty, a type of eye surgery
 * Alk, Albania, a village
 * Alk, Iran, a village in Kurdistan Province
 * Alk-e Kohneh ("Old Alk"), a village in Kurdistan Province, Iran
 * SS Alk, a German cargo ship in service 1928–45
 * A sailing ship renamed as Albatross
 * ALK, the ICAO Code for SriLankan Airlines