Jae'Sean Tate was born in 1995 in Toledo, Ohio. He is the son of Jermaine Tate and Cori Key. Jermaine played college basketball at Ohio State and the University of Cincinnati before playing professionally overseas. Cori died tragically when Jea'Sean was young. Jermaine and his stepmom Jenice Tate later raised Jae'Sean. Jae'Sean has a tattoo of a key on his leg to honor his mother. Tate played his high school basketball at Pickerington Central, which is outside of Columbus. At Pickerington Central, Tate was teammates with fellow NBA veteran Caris LeVert. When Tate was a sophomore, his high school team won the 2012 Division I championship. As a senior, Tate was named Co-Player of the Year in the Ohio Capital Conference. Tate then played four years of college ball at Ohio State. He spent the 2018-19 season playing for the Antwerp Giants in Belgium. In 2019-20, Tate was a wing for the Sydney Kings in Australia, where he scored 16.4 points a game and was named to the All-NBL First Team.