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In February 2019, the National Basketball League (NBL) indicated that Tasmania was on the league's future expansion radar. Twelve months later, it was revealed that Tasmania had secured an NBL licence and a team would enter the league in the 2021–22 season.

On 1 October 2020, the team name was revealed as the Tasmania JackJumpers. On the eve of the team's first NBL game, Tasmanian band Luca Brasi released "Jackies Are On the March", an original theme for the team.

In their NBL debut on 3 December 2021, the JackJumpers defeated the Brisbane Bullets 83–74 in overtime at MyState Bank Arena in Hobart. The JackJumpers finished the regular season in fourth place with a 17–11 record and faced the first-placed Melbourne United in the semi-finals, where they defeated United 2–1 to advance to the NBL Grand Final series. They ultimately lost 3–0 in the grand final to the Sydney Kings.

In the 2023–24 NBL season, the JackJumpers returned to the NBL Grand Final series with a 2–1 semi-finals series victory over the Perth Wildcats. They went on to win their maiden NBL championship with a 3–2 grand final series victory over Melbourne United, becoming the first Tasmanian NBL champions since Launceston Casino City in 1981.