Thaddeus Marik can refer to:
- Thaddeus Marik I, Captain-General of the Free Worlds League from 2804 to 2821, ruling the League during the final years of the First Succession War.
- Thaddeus Marik II, Captain-General of the Free Worlds League from 2948 to 2963, instigator of the infamous Operation Killing Stroke.
- Thaddeus Marik III, the Republic of the Sphere Knight of Augustine, later Warden of reborn Free Worlds League in 3139.
|This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.|