CHK

CHK may refer to:
 * CHK (TV channel), a television channel in Southeast Asia
 * Chesapeake Energy, a major producer of natural gas
 * Civil Hospital Karachi, Pakistan
 * Chiswick railway station, England
 * Christian Historical Voters' League (Dutch: Christelijk Historische Kiezersbond)
 * Chuukese language
 * .CHK, a filename extension used by the CHKDSK program
 * Checksum
 * Cheka (ЧК), Extraordinary Commission, Soviet secret police from 1917 till 1922