Jonathan Malangu Kuminga was born in Goma in the Democratic Republic of the Congo in 2002. French is his first language. Kuminga moved to the United States just before high school. Kuminga initially attended Huntington Prep School in West Virginia. But after his freshman year, he transferred to Our Savior New American in Centereach, New York, where he earned MaxPreps National Sophomore of the Year honors. Kuminga then again transferred to The Patrick School in Hillside, New Jersey. At Patrick, Kuminga averaged 16.2 points and 5.5 rebounds per game as a junior. After his junior season, Kuminga reclassified to the 2020 class, forgoing a senior year of high school hoops. That summer, he announced he would not attend college and instead join the the NBA G League Ignite for their inaugural season. Over 13 games with the Ignite, Kuminga averaged 15.8 points, 7.2 rebounds, 1 steal and 0.8 blocks per game. In the 2021 NBA Draft, 18-year-old Kuminga was selected by the Golden State Warriors with the seventh overall pick.