Charlie Kirk's parents are Robert W. Kirk, an architect from Chicago who was involved in the design of Trump Tower, and his mother Kathryn Kirk, a former trader at the Chicago Mercantile Exchange who later became a licensed mental health counselor. They raised Charlie Kirk in a politically moderate household in Illinois, specifically in the Chicago suburbs including Arlington Heights and Prospect Heights. Charlie Kirk has one known sibling, a younger sister named Mary Kirk. Mary Kirk is an art curator based in Chicago and holds political views that contrast strongly with Charlie's conservative stance. The family lived in Illinois during Charlie's upbringing, but no specific current residence for his parents has been publicly detailed beyond their ties to the Chicago area. Kirk was married to Erika Lane Frantzve, with whom he had two children. His parents stayed largely out of public view during his career and were not notably involved in public events following his death. In summary:

• Parents: Robert W. Kirk (architect), Kathryn Kirk (mental health counselor)
• Siblings: One sister, Mary Kirk (art curator)
• Family roots and upbringing: Suburban Chicago, Illinois

This information draws from multiple sources detailing Kirk's family background and views as publicly known up to September 2025.