Jaxson Dart grew up in Utah, specifically in Kaysville, a small city with a population of about 33,000 located north of Salt Lake City. He spent his early years in Kaysville and attended Roy High School for the first three years of his high school before transferring to Corner Canyon High School in Draper, Utah. His family, including his parents Brandon and Kara Dart, raised him in Utah, where they emphasized hard work and sports participation. Dart also moved to Draper to live with his aunt during part of his high school career to pursue better football training opportunities.