The Boston Celtics have won the most NBA Finals and thus the most NBA championships with 17.
The Seattle SuperSonics won the 1978-1979 NBA finals.
The Boston Celtics. They have won 17 times.The NBA teams that has won the most finals or with the most titles is the The Boston Celtics.
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Miami Heat.
The Philadelphia Warriors
Dallas mavericks
Two 2012 and 2013
The Detroit Pistons won the 1989 NBA Finals.
The Boston Celtics currently have 17 NBA championships
In 1920 there were no NBA Finals. The NBA Finals officially started in 1947.
The Boston Celtics