Haliburton was born on Feb. 29, 2000 in Oshkosh, Wisconsin. He is the son of John and Brenda Haliburton. His cousin Eddie Jones was a three-time NBA All-Star who played 14 years in the NBA. Haliburton's father, John, is a basketball referee. Haliburton played high school basketball at Oshkosh North High School. In his senior season, he averaged 22.9 points, 6.2 assists, 5.1 rebounds, 3.5 steals and 1.7 blocks per game. Those stats led to Haliburton to being named USA Today All-USA Wisconsin Boys Basketball First-Team selection and as Wisconsin 2018 Gatorade Player of the Year. While at Iowa State for college, Haliburton majored in pre-business. On the court, he was named to the Second Team All-Big 12 as a sophomore. He announced on March 24, 2020, after the COVID-19 early end of the NCAA Basketball season, that he was foregoing his final two seasons of college eligibility and entering the 2020 NBA Draft.