The name Martok may refer to:
- Martok, son of Urthog, a General in the Klingon Defense Force in the Dominion War who became Chancellor of the Klingon High Council.
- Martok (mirror), the mirror universe counterpart of Martok.
- Martok, grandfather of Martok, the grandfather of Chancellor Martok.
- Martok (changeling), a changeling who replaced Martok in late 2371, and who was largely responsible in the outbreak of hostilities between the United Federation of Planets and the Klingon Empire.
- Martok (Ferengi), a Ferengi male who served on a Ferengi starship under DaiMon Turane.