In the boys under-16s division one championship, Launceston City Gibson fought to the wire to upset the undefeated Burnie Tigers 59-58.

The win would be made all the more sweeter given Launceston's loss to Burnie in the first game of the championships.

The upset was largely due City's Lachlan Brewer, who scored 29 points. Brewer would finish with an average of 30.3 points per game.

Prior to his finals match against Burnie, Brewer said this year's state junior championships had been great.

"It's been really fun ... there's been a lot of tight games," he said.

Burnie's under-16 girls division one side would also get a 73-37 rinsing at the hands of Devonport.

They would see a championship courtesy of their under-18 division one girls, who took down Somerset Heat 73-49.

The Tigers showed dominance across the board, with Reese Davis finishing the final with 18 points.

The Glenorchy Spartans won the boys under-18 championship.

In Friday's under-14 finals, the girls division one Southern Wolves defeated the Penguin Blues 43-27.

The boys division one under-14s saw Launceston City Gibson claiming the division one championship over Burnie Tigers 82-61.

Earlier in the week, the undefeated Burnie under-12 boys team showed no mercy against Devonport, winning handily 73-28 at Ulverstone.

On the girls' side, the under-12 Latrobe Demons proved too much for Devonport, claiming the grand final 47-24.

Basketball Tasmania chief executive Chris McCoy said this year's championships saw record numbers.

"The response to returning to the sport has been fantastic," he said.

"This year's state championship numbers have been a record and are up 20 per cent up on our previous record last year."

"Basketball is on a real high with the game in great shape internationally, domestically and within the state.

"In addition, we welcomed the Tasmania JackJumpers to the state last week and are excited at the promotion and excitement that they will bring to the sport."

A full list of results can be found at sportstg.com.