Charlie Kirk's parents are Robert W. Kirk, an architect involved in designing Trump Tower in New York, and Kimberly Kirk, a mental health counselor who previously worked as a trader at the Chicago Mercantile Exchange. They raised Charlie in a politically moderate household in the Chicago suburb of Prospect Heights, Illinois. Charlie Kirk has a younger sister named Mary Kirk who has very different political views, being a supporter of Bernie Sanders and left- wing causes. The family lived in the Illinois area, and his parents have remained mostly private despite Charlie's public profile. His sister Mary keeps a low profile and uses an alias on social media. In summary:
- Parents: Robert W. Kirk (architect), Kimberly Kirk (mental health counselor)
- Sister: Mary Kirk, politically left-leaning, different from Charlie's conservative stance
- Family location: Raised in Prospect Heights and Arlington Heights, suburbs of Chicago, Illinois.