Marita Covarrubias is a fictional character on the American science fiction television series The X-Files. She was initially introduced as an informant, leaking diplomatic information to FBI Special Agent Fox Mulder to aid his investigation of paranormal cases, dubbed X-Files. However, she was revealed to be an agent of the secretive Syndicate, although ultimately betraying that organization on several occasions. Introduced in the fourth season opener "Herrenvolk", the character remained a recurring presence until the series' finale, "The Truth".

The sixth season of the science fiction television series The X-Files commenced airing on the Fox network in the United States on November 8, 1998, concluding on the same channel on May 16, 1999, and consisted of twenty-two episodes. The season continued from the 1998 feature film and focused heavily on FBI federal agents Fox Mulder and Dana Scully's separation from the X-Files Division and the demise of the Syndicate—a "shadow government" group attempting to cover up the existence of extraterrestrials—in the two-part episode "Two Fathers" and "One Son".